• 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 with two glass sheets bonded by an interlayer adhesive layer, associated with a camera, the laminated glazing comprising an opaque decoration resulting from the superposition of a first decoration (1) on the intermediate adhesive layer providing a first non-decorative area (11) interposed in the field of the camera, and - a second decoration (2) consisting of an enamel in accordance with a gradient edge area (21) and a solid band (22) delimiting a free zone (23) of smaller size than that of the first decoration (1) to which it is superimposed during assembly of the laminated glazing unit, the solid strip (22) having a width of between 1 and 30 mm, and the smallest dimension of said free zone (23) not being less than 50 mm; three processes for its manufacture and its application as automobile windshield.
    公开号:FR3077761A1
    申请号:FR1851233
    申请日:2018-02-14
    公开日:2019-08-16
    发明作者:Vincent Sauvinet
    申请人:Saint Gobain Glass France SAS；Compagnie de Saint Gobain SA；
    IPC主号:
    专利说明:

    AUTOMOTIVE WINDSHIELD WITH A CAMERA FIELD ZONE WITH REDUCED OPTICAL DISTORTION
    The present invention relates to laminated glazing, in particular to an automobile windshield.
    There is currently a peripheral glazed area around the edge of the windshields. This 20-40 mm wide enameled area has the function of hiding the area where the windshield is bonded to the bodywork. This function is fulfilled whether the enamel is on face 2, face 3 or face 4 of laminated glazing (by convention, the faces of the glass sheets of a windshield or more generally of laminated glazing are numbered from 1 for that which is in direct contact with the external atmosphere). Most often this enamel is positioned on face 2 so as to mask possible small defects of PVB bonding edges (polyvinyl butyral: interlayer adhesive layer) which may appear over time.
    For the same aesthetic reasons when looking at this collage from the outside of the car, a small round of enamel is also positioned at the location of the bonding of the base of the interior mirror.
    Since the 2000s, other accessories have become widespread, such as the rain or light sensors that are attached to the windshield; these have, in known manner, the functions of detecting rain to activate the wipers, respectively of evaluating the brightness to activate the vehicle lighting (headlights). These sensors were naturally placed near the rear-view mirror base and in the field of the wipers so as to ensure on the one hand the reproducibility of the light measurement and on the other hand the intelligent regulation of the wiper sweep.
    Since the 2010s, a camera has sometimes been added. This last option will become general with the arrival of assisted and then autonomous driving. To ensure the aesthetics of the car seen from the outside, the simple small round of enamel a few centimeters in diameter that hid the base of the mirror has become an enameled area that can reach a few hundred cm 2 which encompasses the whole sensors and their connection around the rear-view mirror base and which is now associated with the peripheral enamel zone generally forming a large tongue of enamel descending from the peripheral enamel strip located at the junction of the barrier breeze and from the vehicle roof to below the rear-view mirror base glued to the windshield.
    The camera associated with the windshield is an accessory that will become widespread. Its function is to assist the driver in his driving in order to detect risks and ultimately avoid accidents. The performance specifications of the camera will tighten as this assistance becomes more important in driving a car and in particular the positioning accuracy of detected objects will have to improve. This positioning accuracy requires on the one hand a calibration of the camera when it is mounted on the windshield and on the other hand a sufficient optical quality in the part of the windshield which lies across the field of the camera. Specifications until recently were 400 millidiopters (mdpt) (maximum tolerable optical distortion). These specifications for new car models are now around 100 mdpt. This level of distortion is very difficult to reach in the camera zone when this zone is an enclave in the enameled zone. Indeed, in the vicinity of an enameled area and in particular at a distance of less than 30-40 mm, optical distortions of up to 400 mdpt can be observed, the stronger that one is near the enameled part. These optical distortions result from the fact that one cannot avoid subjecting this zone of the glass to high temperatures when the enamel is fired, which is at a relatively short distance. In particular, when the area of the windshield which lies across the field of the camera is a transparent enclave in the enameled area whose largest dimension is less than 60-80 mm, the entire transparent area has a distortion up to 400 mdpt.
    Saint-Gobain Glass France has in the past developed a PVB printing technology (in English: PVB printing) described in patent applications FR2928929, FR2969957, FR2974103 and
    WO2014020261. This technology consists in depositing on the PVB a compatible ink, this ink possibly being black. PVB being a soft and rough material the printing of this ink does not have the same resolution as that obtained with an enamel on a smooth and flat surface of glass. In the case of enamel, the resolution limit is essentially linked to the mesh of the screen printing screen. It meets the aesthetic requirements of car manufacturers. In the case of printing on PVB, the roughness of the latter does not make it possible to obtain a level of resolution which satisfies all car manufacturers and in particular those selling high-end vehicles in which the most sophisticated cameras are installed. . This defect in resolution is sensitive to the limit of the enameled part and of the glass part and this all the more so that at the place of this limit, to make it pleasing to the eye, a gradient of points is interposed including the contours may become imprecise when using PVB printing technology. Furthermore, still in order to satisfy the quality specifications of automobile manufacturers, the fact of using two different technologies for producing the black decoration of the windscreens implies a relative positioning control of one with respect to the other which is difficult to get. The positioning accuracy of a PVB or other interlayer film is on the order of a millimeter and the alignment of the screen printing dots requires rather a positioning accuracy of one tenth of a millimeter. This second problem is not only related to the use of PVB printing technology, but also to any other technology which involves decoration linked to one of the adhesive interlayer layers of the windshield. This is the case for example when inserting PVB or PET (poly (ethylene terephthalate)) films supporting all or part of the decoration.
    The invention proposes a means of solving the problem, that is to say of making a black or other opaque decoration and of preserving the optical quality sufficient for the precision needs of the camera.
    The invention consists:
    On the one hand to print by screen printing only the periphery of the tongue of enamel descending from the peripheral enamel strip located at the junction of the windshield and the roof of the vehicle up to below the mirror base glued to the windshield; the periphery being defined by the gradient of points and a solid band inside this network of points whose width can be between 1 mm and 40 mm;
    And on the other hand to carry out the decoration inside this zone by a decoration situated on the intermediate adhesive layer by providing in this decoration an area without decoration in the field of the camera, of the rain sensor, of light and possibly other sensors requiring transparency of the facing glass.
    The subject of the invention is therefore a laminated glazing comprising a first, respectively a second glass sheet intended to be positioned towards the outside, respectively the inside of an enclosure in the mounting position, glued to one another. by an intermediate adhesive layer, the main faces of the glass sheets being conventionally numbered 1 to 4 from the outside towards the inside of the enclosure in the mounting position, a camera being associated with the laminated glazing on the inside of the enclosure to assess the external environment of the enclosure, characterized in that the laminated glazing comprises an opaque decoration resulting from the superposition:
    - a first decoration on the intermediate adhesive layer providing a first area without decoration to be inserted in the field of the camera, and
    - a second decoration on the face 2, 3 or 4 of said glass sheets consisting of an enamel in accordance with a degraded edge area if it exists and in a solid strip, delimiting a free area (without enamel) of smaller dimension to that of the first decoration to which it is superimposed during the assembly of the laminated glazing, in that the solid strip has a width of between 1 and 30 mm, and in that the smallest dimension of said free zone does not is not less than 50 mm.
    The evaluation of the external environment by the camera notably consists in a known manner in the detection of any obstacle, pedestrian, two-wheeled vehicle, preceding vehicle, and in the precise measurement of their distance from the glazed enclosure, from the motor vehicle. .
    Thanks to the invention, the positioning precision required to make the decoration on the aesthetically acceptable interlayer adhesive layer is reduced; it is enough that there are superimposed decorations located on a sheet of glass and on the adhesive layer interlayer.
    In addition, the optical distortion in the camera area is that which is obtained in an area without enamel, because this area of the enamelled glass sheet in the field of the camera has not been subjected to an excessive temperature capable of degrade its optical quality during the firing of the enamel. The reason is its relative distance from the enameled area.
    According to preferred characteristics of the laminated glazing of the invention:
    - the solid strip has a width at least equal to 2 mm, at most equal to 10 mm; this range of values is optimal to guarantee an easy superposition of the first and second decorations and obtain a visually perfect whole;
    - the smallest dimension of the said free zone is not less than 70 mm; this value guarantees even further the distance of the zone of the camera field from that of enamel, and finally the maximum optical quality of this zone of the enamelled glass sheet and of the laminated glazing;
    - Said first decoration is of dimensions greater from 1 to 20, preferably 2 to 8 mm, than those of said free zone; this value, together with that of the width of said solid strip, makes it possible to guarantee an easy superposition of the first and second decorations and to obtain a visually perfect assembly, as mentioned previously;
    the second decoration conforms to the periphery of the laminated glazing, comprises a descending enamel tongue, in the mounting position, from the upper side of the laminated glazing in the mounting position, at its junction with a roof part of the enclosure, as far below the base of a rear-view mirror glued to the laminated glazing, and the enamel tongue consists of said edge zone in gradient if it exists and of said solid strip;
    - the first or the second decoration comprises a second zone without decoration intended to be associated with a rain sensor (to which the actuation of the wipers can be controlled);
    - the first or second decoration comprises a third zone without decoration intended to be associated with a light sensor (to which the actuation of the headlights can be controlled);
    - at least two of the first, second and third zones without decoration are combined into one;
    - the second and / or third zone (s) without decoration is (are) circumscribed (s) in said enamel tongue, that is to say in the upper central zone of the laminated glazing (that of the base rear view mirror and camera).
    The subject of the invention is also:
    - A method of manufacturing a laminated glazing as described above, characterized in that it comprises an operation consisting in printing the first decoration on the intermediate adhesive layer by screen printing or equivalent;
    - A method of manufacturing a laminated glazing as described above, characterized in that it comprises an operation consisting in inserting into the intermediate adhesive layer a film of poly (ethylene terephthalate) (PET) or printed equivalent , constituting the first decoration;
    - A method of manufacturing a laminated glazing as described above, characterized in that it comprises an operation consisting in inserting into the interlayer adhesive layer an interlayer adhesive film such as thin colored polyvinylbutyral (PVB), constituting the first decoration.
    The invention also relates to the application of laminated glazing as described above as a windshield of a motor vehicle.
    The invention will be better understood in the light of the following description of the appended drawings in which:
    - Figure 1 shows a first decoration on an intermediate adhesive layer of polyvinyl butyral (PVB);
    - Figure 2 shows a second decoration on a sheet of curved glass; and
    FIG. 3 represents an automobile windshield in which the intermediate adhesive layer of FIG. 1 is superimposed on the glass sheet of FIG. 2.
    Referring to Figure 1, a first decoration 1 was produced in black ink by screen printing on an interlayer adhesive layer of PVB intended to bond two sheets of glass to an automobile windshield. The first decoration (1) comprises a first trapezoidal area without decoration (11) corresponding to the field of view of a camera associated with the windshield.
    In FIG. 2, a curved soda-lime float glass sheet intended to constitute the outer glass sheet of the windshield comprises a second peripheral decoration 2 made up of black enamel on its concave face (face 2 of the windshield).
    In the bonding area of the base of an interior mirror, a central upper tongue of enamel consists of a contour formed by a gradient of points 21 and a solid strip 22 of width between 2 and 10 mm, delimiting a free zone without enamel 23, in accordance with the first decoration 1 but of dimensions 2 to 8 mm smaller than those of the latter 1.
    The smallest dimension of the free zone 23 is not less than 70 mm.
    The second decoration 2 comprises a second and a third zone without decoration 24, 25 combined with respect to rain and light sensors connected to the windshield wipers and headlights of the automobile.
    On the lower peripheral strip of the second decoration 2, a fourth zone without decoration 26 makes it possible to see from the outside of the automobile the vehicle identification number (in English: "Vehicle Identification Number >>: VIN), and / or the technical characteristics of the windshield ...
    Referring to Figure 3, the first decoration 1 is easily placed in coincidence with the free area without enamel 23 of the second decoration 2 by perfectly matching the full strip 22, which it covers and with which it merges.
    In the first trapezoidal zone without decoration 11, by measuring the optical power in transmission, it is determined that the horizontal optical distortion 10 is equal to 78 mdpt.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    1. Laminated glazing comprising a first, respectively a second glass sheet intended to be positioned towards the outside, respectively the inside of an enclosure in the mounting position, bonded to each other by an intermediate adhesive layer, the main faces of the glass sheets being conventionally numbered 1 to 4 from the outside towards the inside of the enclosure in the mounting position, a camera being associated with the laminated glazing on the inside of the enclosure to assess the outside environment of the enclosure, characterized in that the laminated glazing comprises an opaque decoration resulting from the superposition:
    - a first decoration (1) on the intermediate adhesive layer providing a first area without decoration (11) to be inserted in the field of the camera, and
    - a second decoration (2) on the face 2, 3 or 4 of said glass sheets consisting of an enamel in accordance with a gradient edge zone (21) if it exists and in a solid strip (22), delimiting a free zone (without enamel) (23) of dimension smaller than that of the first decoration (1) to which it is superimposed during the assembly of the laminated glazing, in that the solid strip (22) has a width of between 1 and 30 mm, and in that the smallest dimension of said free zone (23) is not less than 50 mm.
    [2" id="c-fr-0002]
    2. Laminated glazing according to claim 1, characterized in that the solid strip (22) has a width at least equal to 2 mm.
    [3" id="c-fr-0003]
    3. Laminated glazing according to one of the preceding claims, characterized in that the solid strip (22) has a width at most equal to 10 mm.
    [4" id="c-fr-0004]
    4. Laminated glazing according to one of the preceding claims, characterized in that the smallest dimension of said free zone (23) is not less than 70 mm.
    [5" id="c-fr-0005]
    5. Laminated glazing according to one of the preceding claims, characterized in that said first decoration (1) is of dimensions from 1 to 20, preferably 2 to 8 mm, than those of said free zone (23).
    [6" id="c-fr-0006]
    6. Laminated glazing according to one of the preceding claims, characterized in that the second decoration (2) conforms to the periphery of the laminated glazing, comprises a descending enamel tongue, in the mounting position, from the upper side of the glazing laminated in the mounting position, at its junction with a roof part of the enclosure, up to below the base of a rear-view mirror glued to the laminated glazing, and in that the enamel tongue consists of said degraded edge area (21) if it exists and said solid strip (22).
    [7" id="c-fr-0007]
    7. Laminated glazing according to one of the preceding claims, characterized in that the first decoration (1) or the second decoration (2) comprises a second zone without decoration (24) intended to be associated with a rain sensor.
    [8" id="c-fr-0008]
    8. Laminated glazing according to one of the preceding claims, characterized in that the first decoration (1) or the second decoration (2) comprises a third zone without decoration (25) intended to be associated with a light sensor.
    [9" id="c-fr-0009]
    9. Laminated glazing according to one of claims 7 or 8 or both, characterized in that at least two of the first (11), second (24) and third (25) areas without decoration are combined in one.
    [10" id="c-fr-0010]
    10. Laminated glazing according to claim 6 and at least one of claims 7 to 9, characterized in that the second (24) and / or the third (25) area (s) without decoration is (are) circumscribed (s) ) in said enamel language.
    [11" id="c-fr-0011]
    11. A method of manufacturing a laminated glazing according to one of the preceding claims, characterized in that it comprises an operation consisting in printing the first decoration (1) on the intermediate adhesive layer by screen printing or equivalent.
    [12" id="c-fr-0012]
    12. A method of manufacturing a laminated glazing according to one of claims 1 to 10, characterized in that it comprises an operation consisting in inserting into the intermediate adhesive layer a film of poly (ethylene terephthalate) (PET) or printed equivalent, constituting the first decoration (1).
    [13" id="c-fr-0013]
    13. A method of manufacturing a laminated glazing according to one of claims 1 to 10, characterized in that it comprises an operation consisting in inserting into the interlayer adhesive layer an interlayer adhesive film such as thin colored polyvinylbutyral (PVB) , constituting the first decoration (1).
    [14" id="c-fr-0014]
    14. Application of laminated glazing according to one of claims 1 to 10 as a motor vehicle windshield.
    类似技术:
    公开号 | 公开日 | 专利标题
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    CA3037338A1|2018-03-29|Method for printing on an exterior face of laminated glazing
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    WO2013017195A2|2013-02-07|Decorative and covering element, instrument panel and method for manufacturing a decorative element
    同族专利:
    公开号 | 公开日
    FR3077761B1|2020-02-21|
    PE20201306A1|2020-11-24|
    US20210031597A1|2021-02-04|
    WO2019158855A1|2019-08-22|
    BR112020014439A2|2020-12-01|
    KR20200120658A|2020-10-21|
    CN110382227A|2019-10-25|
    MA51835A|2021-05-19|
    EP3752361A1|2020-12-23|
    JP2021513473A|2021-05-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20030155790A1|2001-05-25|2003-08-21|Tatsuya Noguchi|Heat-reflecting windshield|
    EP1464632A1|2002-01-11|2004-10-06|Nippon Sheet Glass Company, Limited|Vehicle-use shatter-proof glass and production method therefor|
    EP3118036A1|2014-03-14|2017-01-18|Nippon Sheet Glass Company, Limited|Windshield|WO2021105589A1|2019-11-29|2021-06-03|Saint-Gobain Glass France|Laminated glazing for a camera|
    WO2021110901A1|2019-12-06|2021-06-10|Saint-Gobain Glass France|Method for measuring the optical quality of a given region of a glazing unit, associated measuring device|FR2928929B1|2008-03-19|2012-01-13|Saint Gobain|SERIGRAPIABLE COMPOSITION ON POLYVINYLBUTYRAL|
    FR2969957B1|2010-12-29|2013-01-04|Saint Gobain|METHOD FOR MANUFACTURING A PRINTED GLAZING PRINTED BY SCREEN PRINTING USING A DOUBLE WEAVING SCREEN PRINTING SCREEN|
    FR2974103B1|2011-04-12|2013-04-12|Saint Gobain|SERIGRAPIABLE COMPOSITION ON POLYVINYLBUTYRAL|
    FR2994190B1|2012-07-31|2014-08-08|Saint Gobain|COLORED SERIGRAPIABLE COMPOSITION ON A SHEET OF POLYMERIC MATERIAL|
    EP3034296A1|2014-12-19|2016-06-22|AGC Glass Europe|Laminated glazing|
    US9623634B2|2015-02-19|2017-04-18|Agp America S.A.|Obscuration having superior strength and optical quality for a laminated automotive windshield|JP2021511275A|2018-01-24|2021-05-06|セントラル硝子株式会社|Glazing with a frame for the information acquisition system|
    FR3101420A1|2019-09-30|2021-04-02|Saint-Gobain Glass France|Method for evaluating the optical quality of a delimited area of a glazing|
    FR3110108A1|2020-05-18|2021-11-19|Saint-Gobain Glass France|Manufacturing process of printed laminated glazing|
    CN112159082A|2020-09-21|2021-01-01|福耀玻璃工业集团股份有限公司|Automobile windshield and manufacturing method thereof|
    CN112498058A|2020-12-08|2021-03-16|广州小鹏自动驾驶科技有限公司|Front windshield and automobile|
    法律状态:
    2019-02-08| PLFP| Fee payment|Year of fee payment: 2 |
    2019-08-16| PLSC| Search report ready|Effective date: 20190816 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 3 |
    2021-02-26| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1851233A|FR3077761B1|2018-02-14|2018-02-14|AUTOMOTIVE WINDSHIELD WITH A CAMERA FIELD ZONE WITH REDUCED OPTICAL DISTORTION|
    FR1851233|2018-02-14|FR1851233A| FR3077761B1|2018-02-14|2018-02-14|AUTOMOTIVE WINDSHIELD WITH A CAMERA FIELD ZONE WITH REDUCED OPTICAL DISTORTION|
    JP2020542107A| JP2021513473A|2018-02-14|2019-02-13|Automotive windscreen with camera area zone with reduced optical distortion|
    KR1020207025289A| KR20200120658A|2018-02-14|2019-02-13|Car windshield with reduced optical distortion in the camera field area|
    US16/967,332| US20210031597A1|2018-02-14|2019-02-13|Motor vehicle windscreen in which the zone of the field of a camera has a reduced optical distortion|
    PCT/FR2019/050312| WO2019158855A1|2018-02-14|2019-02-13|Motor vehicle windscreen in which the zone of the field of a camera has reduced optical distortion|
    MA051835A| MA51835A|2018-02-14|2019-02-13|AUTOMOTIVE WINDSHIELD WHOSE FIELD ZONE OF A CAMERA SHOWS A REDUCED OPTICAL DISTORTION|
    BR112020014439-8A| BR112020014439A2|2018-02-14|2019-02-13|motor vehicle windshield where a camera's field zone has reduced optical distortion|
    PE2020001187A| PE20201306A1|2018-02-14|2019-02-13|MOTORIZED VEHICLE WINDSHIELD IN WHICH THE FIELD AREA OF A CAMERA HAS A REDUCED OPTICAL DISTORTION|
    CN201980000818.4A| CN110382227A|2018-02-14|2019-02-13|The area of visual field of camera has the motor vehicle windshield of reduced optical distortion|
    EP19710743.6A| EP3752361A1|2018-02-14|2019-02-13|Motor vehicle windscreen in which the zone of the field of a camera has reduced optical distortion|
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