WO2016125713A1 - 曲面カバーガラス及びその製造方法、並びに車載用表示部材 - Google Patents

曲面カバーガラス及びその製造方法、並びに車載用表示部材 Download PDF

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Publication number
WO2016125713A1
WO2016125713A1 PCT/JP2016/052772 JP2016052772W WO2016125713A1 WO 2016125713 A1 WO2016125713 A1 WO 2016125713A1 JP 2016052772 W JP2016052772 W JP 2016052772W WO 2016125713 A1 WO2016125713 A1 WO 2016125713A1
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WIPO (PCT)
Prior art keywords
axis
cover glass
glass
curved
curved cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/052772
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English (en)
French (fr)
Japanese (ja)
Inventor
藤井　誠
増田　賢一
諭 金杉
直樹 橋谷
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.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=56564059&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2016125713(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to CN202010174145.9A priority Critical patent/CN111410421B/zh
Priority to JP2016573334A priority patent/JP6299888B2/ja
Priority to CN201680009139.XA priority patent/CN107207314B/zh
Priority to DE112016000631.4T priority patent/DE112016000631B4/de
Publication of WO2016125713A1 publication Critical patent/WO2016125713A1/ja
Priority to US15/665,463 priority patent/US10556818B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/0013—Re-forming shaped glass by pressing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
    • C03B23/0352—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet
    • C03B23/0357—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet by suction without blowing, e.g. with vacuum or by venturi effect
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
    • C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion

Definitions

  • the present invention relates to a curved cover glass, a manufacturing method thereof, and an in-vehicle display member.
  • an in-vehicle display member such as an instrument panel or a HUD (Head-Up Display) may be provided in the automobile.
  • an FPD Fluorescence Panel Display
  • a protective cover is disposed on the front surface of the display surface of the FPD used as the in-vehicle display member.
  • an acrylic resin plate excellent in transparency was initially used as a protective plate for an FPD such as a liquid crystal display or an organic EL display (see Patent Document 1).
  • an acrylic resin plate it is necessary to make it thick to ensure the required strength.
  • the acrylic resin deteriorates and the transparency is impaired. Therefore, a tempered glass plate has been used as an FPD protective plate (cover glass) such as a liquid crystal display or an organic EL display (see Patent Documents 2 and 3).
  • the tempered glass plate used as an FPD protective plate is a flat plate, and its display surface is a flat surface.
  • the display surface of the vehicle-mounted display member intended to display various information necessary for driving is flat, the viewing angle from the driver widens in the horizontal direction and / or the vertical direction. Visibility is inferior because it needs to be moved greatly in the horizontal and / or vertical direction.
  • Patent Document 4 discloses a curved window plate used as a windshield of an automobile.
  • this curved window plate is used as a cover glass of an FPD used for a vehicle-mounted display member
  • the following points are problematic.
  • physically tempered glass or laminated glass is used to ensure the required strength.
  • physically tempered glass and laminated glass are thick, and thus are not suitable for FPD cover glasses used for in-vehicle display members.
  • these physically tempered glass and laminated glass are made to have a plate thickness used as a cover glass of an FPD used for an in-vehicle display member, the thickness of the glass becomes thinner than that of an automobile windshield, resulting in a decrease in mechanical strength.
  • the present invention aims to provide a curved cover glass, a manufacturing method thereof, and an in-vehicle display member that can improve the visibility of the in-vehicle display member in order to solve the above-described problems of the prior art.
  • the present invention includes a first surface, A second surface facing the first surface; A glass plate-like body having at least one end face connecting the first surface and the second surface; The glass plate is chemically strengthened, A tangential direction from an arbitrary point on the first surface is an X axis, and a tangential direction from the center of the first surface is a direction perpendicular to the X axis, the X axis and the Y axis.
  • the X axis is a first radius of curvature R 1 of a cross section of the first surface in an XZ plane passing through the X axis and the Z axis among tangential directions of the first surface at an arbitrary point on the first surface.
  • the first surface has a bent portion whose surface is bent in the X-axis direction at at least one point on the first surface, and the first radius of curvature R 1 is 300 to 10,000 mm.
  • a curved surface cover glass in which the number of specific bent portions having the first curvature radius R 1 of less than 300 mm on the first surface is 10 or less per 1 mm 2 of unit area.
  • the present invention includes a first surface, A second surface facing the first surface; A glass plate-like body having at least one end face connecting the first surface and the second surface;
  • the glass plate is made of chemically strengthened glass, Any of the tangential directions at any point on the first surface is defined as an X axis, and among the tangential directions of the first surface at the arbitrary point, a direction orthogonal to the X axis is defined as a Y axis, and the X axis and the When the direction perpendicular to the Y axis is the X axis,
  • the X axis is a first radius of curvature R 1 of a cross section of the first surface in an XZ plane passing through the X axis and the Z axis among tangential directions of the first surface at an arbitrary point on the first surface.
  • the first surface has a bent portion whose surface is bent in the X-axis direction at at least one point on the first surface, and the first radius of curvature R 1 is 300 to 10,000 mm.
  • a curved surface cover glass in which the number of specific bent portions having the first curvature radius R 1 of less than 300 mm on the first surface is 10 or less per 1 mm 2 of unit area.
  • the said bending part in arbitrary 1 point in the site
  • the first surface is also bent in the Y-axis direction
  • the second curvature radius R 2 of the cross section of the first surface of the glass plate in the YZ plane passing through the Y axis and the Z axis may be 300 to 10,000 mm.
  • the second curvature radius R 2 of the cross section of the first surface of the glass plate in the plane may be 300 to 10,000 mm. Moreover, 2 mm or less may be sufficient as the average thickness tave of the said glass plate-shaped body which makes the said curved-surface cover glass. Further, the ratio t max / t min between the maximum value t max and the minimum value t min of the thickness at the bent portion may be 1.0 to 1.5.
  • the maximum length of the first surface in the two-dimensional projection dimension may be 50 mm or more and 1000 mm or less.
  • the maximum value of the surface compressive stress on the first surface may be 600 MPa or more.
  • the first surface may be a concave surface.
  • the present invention is a method for producing the curved cover glass, Provided is a method for producing a curved cover glass, wherein the curved cover glass is formed by a vacuum forming method.
  • the present invention provides an in-vehicle display member in which the curved cover glass is disposed on the display surface of the display member so that the second surface faces the display surface.
  • the display surface of the display member and the second surface of the curved cover glass may be bonded.
  • the display member may be a panel display, and the display member may be a flat panel display (FPD).
  • the curved cover glass when used as a cover glass for an in-vehicle display member, the portion disposed on the display surface of the display member is appropriately bent, so the viewing angle from the driver is It becomes small and the visibility of a vehicle-mounted display member can be improved. Further, according to the present invention, since the curved cover glass is chemically strengthened, sufficient strength can be obtained even when the curved cover glass is used as a cover glass for an in-vehicle display member.
  • curved surface cover glass of the present invention and the in-vehicle display member of the present invention will be described.
  • the curved-surface cover glass of this invention and the vehicle-mounted display member of this invention are not limited to these embodiment.
  • FIG. 1 is a perspective view of a curved color glass for explaining the curved cover glass of the present embodiment.
  • the curved surface cover glass of the present embodiment includes a first surface 11, a second surface 12 that faces the first surface 11, and at least one that connects the first surface 11 and the second surface 12. It consists of a glass plate-like body 10 a having an end face 13.
  • the glass plate-like body 10a in this specification means a plate-like body in which the dimensions of the first surface 11 and the second surface 12 are larger than the thickness of the end surface 13, and a flat plate glass. Does not mean.
  • the glass plate-like body constituting the curved cover glass of the present embodiment has a bent portion as will be described later.
  • main surface is the first surface or the second surface
  • the surface to be used that is, the surface to be the display surface is defined as the first surface of the glass plate.
  • the surface facing the display surface of the in-vehicle display member is the second surface of the glass plate-like body, and the display surface of the in-vehicle display member is bonded to the second surface of the glass plate-like body.
  • FIG. 2 is a schematic explanatory view for explaining a bent portion in the present invention, and shows a curved cover glass.
  • the curved cover glass shown in FIG. 2 is a glass plate having a first surface 11, a second surface 12 that faces the first surface 11, and at least one end surface 13 that connects the first surface 11 and the second surface 12. It consists of a body 10b.
  • the tangential direction of the first surface at an arbitrary point P of the first surface 11 of the glass plate-like body forming the curved cover glass is selected so as to satisfy the following conditions.
  • the tangential direction is taken as the X axis, and of the tangential directions of the first surface at the point P of the first surface, the direction perpendicular to the X axis is taken as the Y axis, and the direction perpendicular to the X axis and the Y axis is taken as the Z axis.
  • the X axis, the Y axis, and the Z axis are axes that have a crossing relationship with each other.
  • the X axis is a cross section of the first surface of the glass plate in the XZ plane passing through the X axis and the Z axis in the tangential direction of the first surface at an arbitrary point P on the first surface of the glass plate.
  • the radius of curvature (hereinafter also referred to as the first radius of curvature) R 1 is set to the minimum direction.
  • the first radius of curvature R 1 may be determined with at least one of these directions as the X axis. In this case, it is preferable to define the first curvature radius R 1 with the direction in which the second curvature radius R 2 described later is minimized as the X axis.
  • the first surface of the glass plate that forms the curved cover glass has a bent portion whose surface is bent in the X-axis direction at at least one point on the first surface.
  • the bent portion refers to a region where the first curvature radius R 1 in the XZ plane is within a range of 300 to 10,000 mm at an arbitrary point P on the first surface. In FIG. 2, the entire first surface 11 forms a bent portion.
  • the first curvature radius R 1 has a bent portion in the range of 300 to 10000 mm, the portion disposed on the display surface of the display member is appropriately bent when used as a cover glass for an in-vehicle display member. Therefore, the viewing angle from the driver is reduced, and the visibility of the in-vehicle display member is improved.
  • the first curvature radius R 1 of the bent portion is preferably in the range of 400 to 2500 mm, and more preferably in the range of 500 to 1000 mm.
  • the bent portion of the glass plate-like body forming the curved cover glass may be bent in the Y-axis direction at least at one point on the bent portion.
  • the radius of curvature R 2 (hereinafter also referred to as the second radius of curvature) R 2 of the first surface of the glass plate in the YZ plane passing through the Y axis and the Z axis is not particularly limited, but is in the range of 300 to 10,000 mm. Is preferably within a range of 400 to 2500 mm, and more preferably within a range of 500 to 1000 mm.
  • the direction in which the first curvature radius R 1 is the smallest among the tangential directions of the first surface at an arbitrary point P on the first surface of the glass plate-like body is the X axis.
  • the curvature radius R 1 and the second curvature radius R 2 satisfy the relational expression of R 1 ⁇ R 2 .
  • the arbitrary points P mentioned above are arbitrary points in the bending part of the 1st surface of a glass plate-like body, for example, when the center area
  • FIGS. 3 to 6 are perspective views showing examples of the configuration of the curved cover glass of the present embodiment, respectively.
  • the curved cover glass shown in FIGS. 3 to 6 is a glass having a first surface 11, a second surface 12 facing the first surface 11, and at least one end surface 13 connecting the first surface 11 and the second surface 12. It consists of plate-like bodies 10c to 10f. 3 to 6 show an arbitrary point P on the first surface 11 of the glass plate-like bodies 10c to 10f and the X axis, Y axis, and Z determined by the point P, as in FIG. In the glass plate-like bodies 10c to 10f shown in FIGS. 3 to 6, the entire first surface 11 forms a bent portion. In the curved cover glass shown in FIG.
  • the size of the glass plate-like body 10c forming the curved cover glass is 600 mm ⁇ 250 mm ⁇ thickness 2 mm.
  • the first surface 11 of the glass plate-like body 10c forming the curved cover glass is a concave surface that is recessed toward the second surface 12, and is bent only in the X-axis direction defined above, and has a first radius of curvature R. 1 is 500 mm.
  • the size of the glass plate-like body 10d forming the curved cover glass is 600 mm ⁇ 250 mm ⁇ thickness 2 mm.
  • First surface 11 of the glass plate-like body 10d forming the curved cover glass is convex, is bent only in the X-axis direction as defined above, first radius of curvature R 1 is 500 mm.
  • the size of the glass plate-like body 10e forming the curved cover glass is 600 mm ⁇ 250 mm ⁇ thickness 2 mm.
  • the first surface 11 of the glass plate-like body 10e forming the curved cover glass is a convex surface, bent in the X-axis direction and the Y-axis direction defined above, the first curvature radius R 1 is 500 mm, and the second The curvature radius R 2 is 1500 mm.
  • the size of the glass plate-like body 10f constituting the curved cover glass is 600 mm ⁇ 250 mm ⁇ thickness 2 mm.
  • the first surface 11 of the glass plate-like body 10f forming the curved cover glass is a convex shape protruding toward the opposite side of the second surface 12 along the X direction and on the second surface 12 side along the Y direction. It is a concave shape that is recessed toward the end, and is bent in the X-axis direction and the Y-axis direction defined above.
  • the first curvature radius R 1 is 500 mm
  • the second curvature radius R 2 is 1500 mm.
  • the curved surface cover glass of the present embodiment is not limited as long as the first surface of the glass plate-like body forming the curved surface cover glass has the bent portion defined above, and is curved as in the curved surface cover glass shown in FIG.
  • the first surface of the glass plate that forms the cover glass may be concave, and the first surface of the glass plate that forms the curved cover glass is convex like the curved cover glass shown in FIGS. It may be.
  • the first surface of the glass plate-like body forming the curved cover glass is convex in one direction (for example, the X-axis direction) and the other direction (for example, the Y-axis direction). It may be a concave compound curved surface.
  • the curved surface cover glass of the present embodiment may have a shape that curves in a single direction as shown in FIGS. 1, 3, and 4, or may have a bowl shape that has a bottomed shape as shown in FIGS. A saddle shape as shown in FIG. 6 may be used. Furthermore, it may be a waveform having a plurality of inflection points or a curved shape such as a concentric circle. That is, the curved cover glass of the present embodiment can adopt any curved shape as long as it is a glass plate having a bent portion. From the viewpoint of improving the visibility of the in-vehicle display member, it is preferable that the first surface serving as the display surface when used as a cover glass of the in-vehicle display member is a concave surface.
  • the entire first surface 11 of the glass plate-like bodies 10c, 10d, 10e, and 10f forming the curved cover glass is bent, and the entire first surface 11 is a bent portion.
  • a part of 1st surface may be a bending part.
  • a portion where the first radius of curvature R 1 exceeds 10,000 mm is defined as a substantially flat portion which is not bent, and a portion where the radius of curvature is less than 300 mm is defined as a specific bent portion.
  • the glass plate-like body forming the curved cover glass may have these substantially flat portions and unique bent portions.
  • a site where irregular defects such as swells, scratches, dents and the like having a curvature radius of less than 300 mm are present on the glass surface is a specific bend.
  • the number of specific bent portions is 10 or less per 1 mm 2 on the first surface of the glass plate that forms the curved cover glass.
  • the glass plate-like body forming the curved cover glass is at least one point in the portion adjacent to the end surface of the first surface, or a range within 100 mm from the end surface.
  • the former is a case where the bent portion on the first surface is connected to the end surface
  • the latter is a case where the bent portion on the first surface is not connected to the end surface.
  • a substantially flat portion or a specific bent portion exists between the bent portion on the first surface and the end surface.
  • the glass plate-like body forming the curved cover glass is the first from the viewpoint of improving the visibility.
  • the second curvature radius R 2 is preferably in the range of 300 to 10,000 mm at least at one point in the surface adjacent to the end surface or at least one point in the range of 100 mm from the end surface.
  • the former is a case where the bent portion on the first surface is connected to the end surface
  • the latter is a case where the bent portion on the first surface is not connected to the end surface.
  • a substantially flat portion or a specific bent portion exists between the bent portion on the first surface and the end surface.
  • the second curvature radius R 2 is more preferably in the range of 300 to 10000 mm at any one point within the range of 50 mm from the end surface, and any one point within the range of 300 mm from the end surface
  • the second curvature radius R 2 is more preferably in the range of 300 to 10000 mm.
  • the thickness t of the glass plate-like body forming the curved cover glass is preferably small for the following reason.
  • the mass of the curved cover glass is reduced by reducing the thickness t.
  • the absorbance in the thickness direction of the curved cover glass is proportional to the thickness t. Therefore, by reducing the thickness t, the absorbance can be reduced and the visible light transmittance in the thickness direction of the curved cover glass can be increased, so that the visibility is improved.
  • FIG. 7 is an explanatory diagram for explaining the thickness t of the glass plate-like body forming the curved cover glass.
  • a glass plate-like body 10 g shown in FIG. 7 has a first surface 11, a second surface 12 that faces the first surface 11, and at least one end surface 13 that connects the first surface 11 and the second surface 12.
  • the thickness t of the glass plate-like body at an arbitrary point Q on the first surface is the method for the arbitrary point Q on the first surface 11 and the first surface 11 at the point Q as shown in FIG.
  • the average thickness t ave of the glass plate-like body constituting the curved cover glass is 3 mm or less, preferably 2 mm or less, more preferably 1.5 mm or less, and 1 mm or less. More preferably, it is particularly preferably 0.7 mm or less. If the average thickness t ave of the glass plate-like body is 3 mm or less, the chemical strengthening treatment can be carried out efficiently and the weight can be reduced. Moreover, if the average thickness tave of a glass plate-shaped object is 2 mm or less, when the curved-surface cover glass of this embodiment is used for a touch panel, the outstanding sensitivity will be obtained.
  • the lower limit is not particularly limited, but is 0.1 mm, preferably 0.2 mm, more preferably 0.3 mm, further preferably 0.4 mm, and particularly preferably 0.5 mm. If the average thickness t ave of the glass plate is 0.1 mm or more, excellent strength can be obtained.
  • the ratio t max / t min between the maximum value t max and the minimum value t min of the thickness at the bent portion of the glass plate is preferably 1.0 to 1.5. It is more preferably 0 to 1.1.
  • the maximum length in the two-dimensional projection dimension of the first surface of the glass plate-like body forming the curved cover glass is 50 mm or more and 1000 mm or less. This is preferable because the effect of is remarkable, more preferably 200 mm or more and 700 mm or less, and further preferably 300 mm or more and 600 mm or less.
  • the maximum length in the two-dimensional projection dimension is the one having the largest area among the plane figures obtained by projecting the first surface of the glass plate-like body forming the curved cover glass onto the two-dimensional plane from an arbitrary direction. Is the length of the largest straight line among the straight lines connecting any two points on the outline of the plane figure.
  • the two-dimensional projection dimension When the maximum length in the two-dimensional projection dimension is 50 mm or more and 1,000 mm or less, the two-dimensional projection dimension is not too small for use as an in-vehicle display member, and the viewing angle from the driver extends in the horizontal direction and / or the vertical direction. It will not be too much.
  • the glass plate-like body forming the curved cover glass is chemically strengthened in order to ensure mechanical strength and scratch resistance required as a cover glass for a vehicle-mounted display member.
  • the glass plate-like body which is chemically strengthened glass, is chemically strengthened to form a compressive stress layer on the surface, and has improved strength and scratch resistance.
  • Chemical strengthening involves the exchange of alkali metal ions (typically Li ions or Na ions) with a small ionic radius on the glass surface by ion exchange at temperatures below the glass transition point, and alkali metal ions with a larger ionic radius (typically Is a process of forming a compressive stress layer on the glass surface by exchanging with K ions.
  • the chemical strengthening treatment can be performed by a conventionally known method.
  • the glass composition of the glass plate-like body forming the curved cover glass is not particularly limited as long as chemical strengthening treatment is possible. Can be mentioned.
  • the glass plate-like body forming the curved cover glass preferably has a total content of Li 2 O and Na 2 O of 12 mol% or more in the glass composition. Further, as the Li 2 O content in the glass composition increases, the glass transition point decreases and molding becomes easier. Therefore, the Li 2 O content is preferably 0.5 mol% or more. It is more preferably 0 mol% or more, and further preferably 2.0 mol% or more. Furthermore, in order to increase surface compressive stress (Compressive Stress: CS) and compressive stress layer depth (Depth of Layer: DOL), the glass composition of the glass plate has a SiO 2 content of 60 mol% or more, and Al 2 O 3 .
  • Compressive Stress: CS Compressive Stress
  • DOL compressive stress layer depth
  • the maximum value of the surface compressive stress on the first surface is preferably 600 MPa or more, and the depth of the compressive stress layer is preferably 10 ⁇ m or more.
  • the composition of the glass plate-like body constituting the curved cover glass is expressed in mol%, SiO 2 is 50 to 80%, Al 2 O 3 is 0.1 to 25%, Li 2 O + Na 2.
  • a glass containing 3 to 30% of O + K 2 O, 0 to 25% of MgO, 0 to 25% of CaO and 0 to 5% of ZrO 2 may be mentioned, but is not particularly limited. More specifically, the following glass compositions may be mentioned.
  • “containing 0 to 25% of MgO” means that MgO is not essential but may contain up to 25%.
  • the glass of (i) is contained in soda lime silicate glass, and the glass of (ii) and (iii) is contained in aluminosilicate glass.
  • (I) a composition expressed in mol%, in a composition expressed in mol%, SiO 2 is 63 to 73%, Al 2 O 3 is 0.1 to 5.2%, Na 2 O is 10 to 16%, Glass containing 0 to 1.5% K 2 O, 0 to 5.0% Li 2 O, 5 to 13% MgO, and 4 to 10% CaO.
  • composition expressed in mol% is SiO 2 50-74%, Al 2 O 3 1-10%, Na 2 O 6-14%, K 2 O 3-11%, Li 2 O 0 to 5.0%, MgO 2 to 15%, CaO 0 to 6% and ZrO 2 0 to 5%, and the total content of SiO 2 and Al 2 O 3 is 75% or less, Na A glass having a total content of 2 O and K 2 O of 12 to 25% and a total content of MgO and CaO of 7 to 15%.
  • composition expressed in mol% is SiO 2 68-80%, Al 2 O 3 4-10%, Na 2 O 5-15%, K 2 O 0-1%, Li 2 O Containing 0 to 5.0% of Mg, 4 to 15% of MgO, and 0 to 1% of ZrO 2 .
  • the composition expressed in mol% is SiO 2 67-75%, Al 2 O 3 0-4%, Na 2 O 7-15%, K 2 O 1-9%, Li 2 O 0 to 5.0%, MgO 6 to 14% and ZrO 2 0 to 1.5%, and the total content of SiO 2 and Al 2 O 3 is 71 to 75%, Na 2 O and K Glass whose total content of 2 O is 12 to 20%, and when CaO is contained, the content is less than 1%.
  • the glass plate-like body forming the curved cover glass is formed into a predetermined shape from a flat plate glass.
  • a desired forming method may be selected from the self-weight forming method, the vacuum forming method, and the press forming method according to the shape of the glass plate-like body after forming.
  • a plate glass is placed on a predetermined mold corresponding to the shape of the glass plate-shaped body after molding, then the plate glass is softened, and the plate glass is bent by gravity to fit into the mold. It is the method of shape
  • the vacuum forming method is a method of forming a predetermined shape by applying a differential pressure to the front and back surfaces of the plate glass while the plate glass is softened, bending the plate glass and fitting it into a mold.
  • a plate glass is set on a predetermined mold corresponding to the shape of the glass plate after molding, a clamp mold is set on the plate glass, and the periphery of the plate glass is sealed, and then the mold and A pressure difference is given to the front and back surfaces of the plate glass by reducing the space with the plate glass with a pump. Under the present circumstances, you may pressurize the upper surface side of plate glass auxiliary.
  • a sheet glass is placed between predetermined molds (lower mold, upper mold) corresponding to the shape of the molded glass sheet, and the sheet glass is softened and pressed between the upper and lower molds.
  • predetermined molds lower mold, upper mold
  • the vacuum forming method is particularly preferable as a method for forming a glass plate body forming a curved cover glass into a predetermined shape.
  • the vacuum forming method since one of the two opposing main surfaces of the glass plate can be formed without contacting the mold, uneven defects such as scratches and dents can be reduced.
  • the number of specific bent portions on the first surface can be 10 or less per 1 mm 2 , which is preferable from the viewpoint of improving visibility.
  • the glass plate-like body that forms the curved cover glass may be used.
  • a functional layer include an antiglare layer, an antireflection layer, and an antifouling layer, and are not particularly limited as long as the function can be imparted to the glass plate.
  • These functional layers are provided at least on the bent portion of the first surface of the glass plate-like body.
  • the haze of the bent portion of the first surface is 50% or less, preferably 40% or less, and preferably 30% or less. More preferably, it is more preferably 20% or less. When the haze value is 50% or less, a decrease in contrast is sufficiently suppressed.
  • a well-known method can be utilized and a glare-proof layer can be formed by wet coating, such as the spray method using a liquid raw material, or etching of glass.
  • the static friction coefficient of the bent portion of the first surface is preferably 1.0 or less, more preferably 0.9 or less. More preferably, it is 0.8 or less.
  • the coefficient of static friction is 1.0 or less, finger slipping is good when a human finger touches the bent portion of the first surface.
  • the dynamic friction coefficient of the bent portion of the first surface is preferably 0.02 or less, more preferably 0.015 or less, and further preferably 0.01 or less. If the dynamic friction coefficient is 0.02 or less, finger slipping is good when a human finger touches the bent portion of the first surface.
  • an antibacterial layer containing silver or titanium oxide, an antifogging layer for preventing fogging, or the like can be selected.
  • the printing layer for improving concealment property may be sufficient.
  • Various functional layers such as the antiglare layer and the antireflection layer are formed on the inside of the glass plate (inside of the thickness direction from the surface) in addition to the form formed on the surface of the glass plate. The form which was made and the whole glass plate-like body may function as the said functional layer may be sufficient.
  • the functional layer may be formed on the entire surface of the glass, or may be a part such as a frame shape on the outer edge, and there is no particular limitation.
  • the in-vehicle display member of the present embodiment is obtained by arranging the curved cover glass of the present embodiment on the display surface of the display member.
  • the second surface of the body is bonded via an adhesive.
  • Conventionally known adhesives can be used as the adhesive, but those having an average light transmittance of 95% or more at a wavelength of 400 nm to 800 nm are preferable.
  • the display member examples include a flat panel display (FPD) such as a liquid crystal display, an organic EL display, and a plasma display, projection mapping, and electronic paper.
  • FPD flat panel display
  • the curved cover glass of the present embodiment is suitable for a curved display member (panel display) such as an organic EL display. Visibility from the viewer can be improved by mounting the display member along the shape of the curved cover glass.
  • the shape of the display surface of the display member and the shape of the second surface of the glass plate-like body forming the curved cover glass are the same from the viewpoint of improving the visibility. preferable.
  • the thickness of the adhesive is uniform on the second surface because the shapes of the two match. It is preferable because the visibility is further improved.
  • the curved surface cover glass of the present embodiment has a small radius t of the glass plate-like body forming the curved surface cover glass. Therefore, the curvature radius (the first curvature radius R 1 , the second curvature) at the bent portion of the first surface. The difference between the radius R 2 ) and the radius of curvature of the second surface facing the first surface is small. Therefore, the curvature radii (first curvature radius R 1 , second curvature radius R 2 ) at the bent portion of the first surface of the glass plate-like body forming the curved cover glass are set to the shape of the display surface of the display member and the curved cover glass. It can be used as a judgment index for coincidence with the shape of the second surface of the glass plate.
  • the absolute value of the difference between R 1 and the radius of curvature in the same direction is preferably 10% or less, more preferably 5% or less, and more preferably 3% or less of the first curvature radius R 1. Further preferred.
  • plate glass manufactured by Asahi Glass Co., Ltd., product name: Dragontrail (registered trademark), 650 mm ⁇ 220 mm ⁇ average thickness t ave 2.0 mm
  • the plate glass was heated to 720 ° C. and softened, then a differential pressure was applied to the front and back surfaces of the plate glass, and the plate glass was bent and fitted into a mold to be formed into a predetermined shape.
  • the first surface is observed with an optical microscope in that the first curvature radius R 1 is 1000 mm and the second curvature radius R 2 is 10000 mm. It was.
  • a digital microscope manufactured by Keyence Corporation, VHX-600 was used as the optical microscope.
  • the first surface is a surface that is not in contact with the mold during vacuum forming.
  • the photograph of the 1st surface observed by this is shown in FIG.
  • the magnification is 450 times.
  • the specific bending portion in the observation area on the first surface was one per unit area of 1 mm 2 , and the visibility was not affected.
  • the second surface of the obtained curved cover glass was similarly observed with an optical microscope at a point on the second surface opposite to the point on the first surface observed in FIG.
  • the second surface is a surface in contact with the mold during vacuum forming.
  • the photograph of the 2nd surface observed by this is shown in FIG.
  • the number of specific bent portions in the observation area on the second surface was about 30 per unit area of 1 mm 2 , and the visibility deteriorated.

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  • Chemical & Material Sciences (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Surface Treatment Of Glass (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
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PCT/JP2016/052772 2015-02-05 2016-01-29 曲面カバーガラス及びその製造方法、並びに車載用表示部材 Ceased WO2016125713A1 (ja)

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CN202010174145.9A CN111410421B (zh) 2015-02-05 2016-01-29 曲面保护玻璃及其制造方法、以及车载用显示构件
JP2016573334A JP6299888B2 (ja) 2015-02-05 2016-01-29 曲面カバーガラス及びその製造方法、並びに車載用表示部材
CN201680009139.XA CN107207314B (zh) 2015-02-05 2016-01-29 曲面保护玻璃及其制造方法、以及车载用显示构件
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JP6299888B2 (ja) 2018-03-28
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CN111410421B (zh) 2022-06-24
TWI681935B (zh) 2020-01-11
CN111410421A (zh) 2020-07-14
TW201636309A (zh) 2016-10-16
JP6687044B2 (ja) 2020-04-22
CN107207314A (zh) 2017-09-26
US20170327402A1 (en) 2017-11-16
JPWO2016125713A1 (ja) 2017-11-30
DE112016000631B4 (de) 2023-08-31
TW202012325A (zh) 2020-04-01
DE112016000631T8 (de) 2017-12-21
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TWI701220B (zh) 2020-08-11
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