WO2016136758A1 - 曲面カバーガラス及びその製造方法、並びに、ガラス部材、表示装置、曲面ガラス - Google Patents
曲面カバーガラス及びその製造方法、並びに、ガラス部材、表示装置、曲面ガラス Download PDFInfo
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- WO2016136758A1 WO2016136758A1 PCT/JP2016/055299 JP2016055299W WO2016136758A1 WO 2016136758 A1 WO2016136758 A1 WO 2016136758A1 JP 2016055299 W JP2016055299 W JP 2016055299W WO 2016136758 A1 WO2016136758 A1 WO 2016136758A1
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- axis
- glass
- cover glass
- curved
- curved cover
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- 239000011521 glass Substances 0.000 title claims abstract description 239
- 239000006059 cover glass Substances 0.000 title claims abstract description 200
- 238000000034 method Methods 0.000 title claims description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000007666 vacuum forming Methods 0.000 claims description 6
- 239000005345 chemically strengthened glass Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 6
- 239000005357 flat glass Substances 0.000 description 19
- 239000000203 mixture Substances 0.000 description 12
- 238000003426 chemical strengthening reaction Methods 0.000 description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 8
- 229910018068 Li 2 O Inorganic materials 0.000 description 8
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 238000000465 moulding Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 2
- 229910001413 alkali metal ion Inorganic materials 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
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- 230000003068 static effect Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- 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
- C03C3/087—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 containing calcium oxide, e.g. common sheet or container glass
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
-
- 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
- C03B23/025—Re-forming glass sheets by bending by gravity
-
- 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
- C03B23/025—Re-forming glass sheets by bending by gravity
- C03B23/0252—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging
-
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
Definitions
- the present invention relates to a curved cover glass and a manufacturing method thereof, and a glass member, a display device, and a curved glass, which are used for the purpose of protecting interior parts of automobiles and the display surface of a display device and enhancing aesthetics.
- mobile devices such as tablet PCs (Personal Computers) and smartphones (hereinafter also referred to as “smartphones”), or display devices such as liquid crystal televisions (LCD panels), organic EL panels and touch panels (hereinafter referred to as the present specification).
- LCD panels liquid crystal televisions
- organic EL panels organic EL panels
- touch panels hereinafter referred to as the present specification.
- display devices and the like a cover glass for protecting the display surface which is a display and enhancing aesthetics is often used.
- Cover glasses for the above automotive interior parts and display devices are arranged to achieve design requirements, such as improved design, imparting a sense of luxury, followability to interior design and body design, etc.
- the part to be made may have a three-dimensional shape.
- the adhesive can be used to easily and reliably fix the cover glass to the front surface of automobile interior parts and the display surface of the display device.
- the adhesive in consideration of visibility, workability, ease of assembly, and the like, only the outer peripheral portion of the cover glass that is outside the (effective) display surface of the display device or the like is fixed with an adhesive.
- the cover glass when using curved glass as a cover glass, if only the outer periphery of the cover glass is fixed with an adhesive, the cover glass may not be securely fixed. This is because a load is applied to the adhesive used for fixing depending on the molding accuracy of the curved glass, and it is gradually peeled off.
- DPG method In the field of building materials, there is a method called DPG method, in which a connecting mechanism such as a special hinge bolt is inserted into an opening provided in a plate glass to support and fix the plate glass (see Patent Document 1).
- a connecting mechanism such as a special hinge bolt is inserted into an opening provided in a plate glass to support and fix the plate glass (see Patent Document 1).
- curved glass is used as a cover glass, when this procedure is applied as a cover glass fixing means, it is difficult to form an opening in the curved glass. There is a risk of damage.
- the present invention provides a curved cover glass that can be easily and reliably fixed to automobile interior parts and a display device, a manufacturing method thereof, a glass member, a display device, and a curved surface.
- the purpose is to provide glass.
- the present invention has the following configuration. (1) the 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 has an average thickness t ave of 5 mm or less, 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 10000 mm or less
- a curved cover glass in which at least one opening is provided in the glass plate to communicate the first surface and the second surface.
- the glass plate has an average thickness t ave of 5 mm or less, 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 10000 mm or less
- the curved cover glass, wherein the bent portion is provided with at least one opening that allows the first surface and the second surface to communicate with each other.
- the first side A second surface facing the first surface; It consists of a glass plate having at least one end face connecting the first surface and the second surface, and the average thickness t ave of the glass plate is 5 mm or less, 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 two-dimensional projection shape is a substantially circular shape, a substantially elliptical shape, a substantially semicircular shape, or a substantially semi-elliptical shape, and the maximum length in the two-dimensional projection shape is 1.5 to 200 mm,
- a curved cover glass provided with at least one recess.
- the first side A second surface facing the first surface; It consists of a glass plate having at least one end face connecting the first surface and the second surface, and the average thickness t ave of the glass plate is 5 mm or less, 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 two-dimensional projection shape is a substantially circular shape, a substantially elliptical shape, a substantially semicircular shape, or a substantially semielliptical shape, and the maximum length in the two-dimensional projection shape is 1.5 to 200 mm, and at least one Curved cover glass characterized in that two concave portions are provided.
- a glass member having the curved cover glass of (1) or (2) above and a housing The casing is a glass member having at least one connection mechanism that is fitted into the opening of the curved cover glass and connects the curved cover glass and the casing.
- a glass member having the curved cover glass of (3) or (4) above and a housing The casing is a glass member having at least one connection mechanism that fits into the concave portion of the curved cover glass and connects the curved cover glass and the casing.
- a display device comprising the curved cover glass of any one of (1) to (4) above and a display device.
- a method for producing a curved cover glass for producing the curved cover glass of (1) or (2) above A drill having a grindstone in a grinding part is rotated about a rotation axis and revolved around an axis connecting the first surface and the second surface so as to draw a spiral to form an opening.
- a method for producing a curved cover glass (9) A method for producing a curved cover glass for producing the curved cover glass of (3) or (4) above, A drill provided with a grindstone in a grinding part is rotated about a rotation axis and revolved around an axis connecting the first surface and the second surface so as to draw a spiral to form the recess.
- a method for producing a curved cover glass A method for producing a curved cover glass.
- the glass plate has an average thickness t ave of 5 mm or less, 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.
- R 1 the direction in which 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 10000 mm or less
- Curved glass provided with at least one opening for communicating the first surface and the second surface with the glass plate.
- the first surface (11) the first surface; A second surface facing the first surface; It consists of a glass plate having at least one end face connecting the first surface and the second surface, and the average thickness t ave of the glass plate is 5 mm or less, 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 two-dimensional projection shape is a substantially circular shape, a substantially elliptical shape, a substantially semicircular shape, or a substantially semi-elliptical shape, and the maximum length in the two-dimensional projection shape is 1.5 to 200 mm, Curved glass provided with at least one recess.
- the connection mechanism is inserted into the opening or the recess so that the fixing to the automobile interior member or the display device or the like can be performed. Easy and reliable implementation.
- (A) is a partial perspective view of the curved cover glass or curved glass shown in FIG. 4, and (b) is a partial sectional side view of the curved cover glass or curved glass shown in FIG. It is the fragmentary sectional side view which showed another structural example of the curved-surface cover glass or curved-surface glass of this embodiment.
- (a) is a fragmentary perspective view
- (b) is a fragmentary sectional side view.
- curved cover glass or curved glass of the present invention and the glass member of the present invention will be described.
- the curved cover glass or curved glass of the present invention and the glass member of the present invention are not limited to these embodiments.
- the present invention will be described by taking a curved cover glass as an example. .
- FIG. 1 is a view for explaining a curved cover glass of the present embodiment.
- the curved surface cover glass of the present embodiment connects the first surface 11, the second surface 12 facing the first surface 11, and the first surface 11 and the second surface 12. It consists of a glass plate-like body 10a having at least one 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 is a flat plate glass. Does not mean.
- the glass plate-like body 10a constituting the curved cover glass of the present embodiment has a bent portion 14, and the bent portion 14 is provided with at least one opening 15 (four openings 15 in the illustrated embodiment). It has been.
- the opening 15 communicates the first surface 11 and the second surface 12 of the glass plate 10a.
- the glass plate body is not particularly limited which of the two main surfaces of the glass plate body is the first surface or the second surface, but it is used as a cover glass for automobile interior parts, display devices, and the like.
- the surface exposed to the outside that is, the surface serving as the display surface is defined as the first surface of the glass plate.
- the surface facing the display surface of the automobile interior part or the display device is the second surface of the glass plate.
- FIG. 2 is a 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 not the curved cover glass of the present embodiment because no opening is provided in the bent portion.
- the curved cover glass shown in FIG. 2 has a first surface 110, a second surface 120 facing the first surface 110, and at least one end surface 130 connecting the first surface 110 and the second surface 120. It consists of a glass plate 100.
- the tangential direction of the first surface at an arbitrary point P of the first surface 110 of the glass plate-like body forming the curved cover glass is selected so as to satisfy the following conditions.
- the tangential direction is the X axis, and among the tangential directions of the first surface at the point P of the first surface, the direction orthogonal to the X axis is the Y axis, and the direction orthogonal to the X axis and the Y axis is the Z axis.
- the X axis is the first of the glass plate in the XZ plane passing through the X axis and the Z axis, among the tangential directions of the first surface at an arbitrary point P on the first surface of the glass plate.
- a direction in which the radius of curvature (hereinafter also referred to as a first radius of curvature) R 1 of the cross section of the surface is minimized.
- the first radius of curvature R 1 may be determined with at least one of these directions 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 10000 mm or less at an arbitrary point P on the first surface. In FIG. 2, the entire first surface 110 forms a bent portion.
- the first curvature radius R 1 has a bent portion of 10000 mm or less, when used as a cover glass for an automobile interior member or a display device, the portions arranged on these display surfaces are bent appropriately. Therefore, the viewing angle from the user is reduced and the visibility is improved.
- the first radius of curvature R 1 of the bent portion is preferably in the range of 300 to 3000 mm, and more preferably in the range of 500 to 2000 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 curvature radius (hereinafter also referred to as the second curvature radius) R 2 of the first surface of the glass plate in the YZ plane passing through the Y axis and the Z axis is preferably 10000 mm or less, and preferably 300 to 3000 mm. More preferably, it is in the range of 500 to 2000 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 curved cover glass of this embodiment is required for the following reason that the thickness t of the glass plate-like body forming the curved cover glass is small.
- 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. 3 is a diagram for explaining the thickness t of a glass plate-like body that forms a curved cover glass.
- the curved cover glass shown in FIG. 3 is not the curved cover glass of the present embodiment because no opening is provided in the bent portion.
- a glass plate 100 shown in FIG. 3 includes a first surface 110, a second surface 120 that faces the first surface 110, and at least one end surface 130 that connects the first surface 110 and the second surface 120.
- the thickness t of the glass plate at an arbitrary point P on the first surface is as follows with respect to the arbitrary point P on the first surface 110 and the first surface 110 at the point P, as shown in FIG. The shortest distance connecting the normal line and the intersection point Q of the second surface 120 of the glass plate-like body.
- the average thickness t ave of the glass plate-like body forming the curved cover glass is 5 mm or less.
- the average thickness t ave of the glass plate-like body constituting the curved cover glass is preferably 2 mm or less, more preferably 1.5 mm or less, and 1.0 mm or less from the viewpoint of weight reduction and sensing of touch panels and the like. More preferably, it is particularly preferably 0.7 mm or less.
- 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.
- FIG. 4 is a view showing a configuration example of the curved cover glass of the present embodiment.
- the curved cover glass shown in FIG. 4 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. It consists of a glass plate 10a.
- FIG. 4 shows an arbitrary point P on the first surface 11 of the glass plate-like body 10a and the X axis, Y axis, and Z determined by the point P, as in FIG. In the glass plate-like body 10a shown in FIG. 4, only a portion of the first surface 11 close to the right end surface in the drawing forms the bent portion 14.
- a portion where the first radius of curvature R 1 is greater than 10,000 mm is defined as a substantially flat portion that is not bent, and a portion where the radius of curvature is less than 300 mm is defined as a specific bent portion.
- the portion of the first surface 11 other than the portion close to the right end surface in the drawing forming the bent portion 14 is a substantially flat portion.
- the glass plate-like body forming the curved surface cover glass is at any one point in a portion adjacent to the end surface of the first surface, or within a range of 100 mm from the end surface. It is preferable to have a bent portion at an arbitrary point from the viewpoint of improving the visibility when used as a cover glass for automobile interior parts, display devices, and the like.
- 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 10a that forms the curved cover glass is that the opening 15 provided in the bent portion 14 is provided at a position 5 mm or more away from the end surface of the first surface 11. It is preferable from the viewpoint of preventing damage.
- the opening 15 provided in the bent portion 14 is more preferably provided at a position separated from the end face of the first surface 11 by 10 mm or more, and more preferably provided at a position separated by 20 mm or more.
- the size of the glass plate-like body 10a forming the curved cover glass is 600 mm ⁇ 250 mm ⁇ average thickness t ave 1 mm.
- the bent portion 14 is bent only in the X-axis direction defined above so that the first surface 11 forms a convex surface, and the first radius of curvature R 1 is 500 mm.
- Four openings 15 are formed in the bent portion 14 so as to be aligned at equal intervals in the Y-axis direction.
- the maximum diameter d in the two-dimensional projection shape of the opening 15 is 50 mm.
- the maximum diameter d in the two-dimensional projection shape of the opening 15 is preferably 50 mm or less from the viewpoint of preventing the glass plate-like body 10a constituting the curved surface cover glass from being damaged.
- the maximum diameter d in the two-dimensional projection shape of the opening 15 is more preferably 30 mm or less, and further preferably 10 mm or less.
- FIG. 5 is an explanatory diagram showing a plane figure obtained by projecting a first surface of a glass plate-like body forming a curved cover glass onto a two-dimensional plane from an arbitrary direction. As shown in FIG.
- the maximum diameter d in the two-dimensional projection shape of the opening 15 is the one having the largest area 33 corresponding to the opening 15 in the planar figure 31 obtained by projection.
- the maximum length of the straight line connecting the two arbitrary points K1 and K2 on the outline of the plane figure corresponding to the opening 15 is indicated.
- the two-dimensional projection shape of the opening 15 is substantially circular, substantially elliptical, substantially semicircular, or substantially It becomes a semi-elliptical shape.
- the maximum diameter d in the two-dimensional projection shape of the opening 15 may be different between the first surface 11 side and the second surface 12 side. In this case, the opening 15 has a tapered shape with a different maximum diameter d in the thickness direction of the glass plate 10a.
- FIG. 6 is an explanatory view showing a plan view obtained by projecting a glass plate-like body forming a curved cover glass from a direction parallel to the first surface.
- the two-dimensional projection shape 35 of the first surface 11 of the glass plate 10 a having a length Lw has a region 37 corresponding to the bent portion 14.
- the maximum length of this region 37 is L (mm). If the ratio d / L of the maximum diameter d (mm) in the two-dimensional projection shape of the opening 15 to the maximum length L (mm) is 0.6 or less, the glass plate-like body 10a forming the curved cover glass is damaged. It is preferable from the viewpoint of prevention.
- the ratio d / L between the maximum diameter d of the opening 15 and the maximum length L of the bent portion 14 in the two-dimensional projection shape is more preferably 0.5 or less, and further preferably 0.4 or less.
- FIG. 7A is a partial perspective view of the curved cover glass shown in FIG. 4, and FIG. 7B is a partial sectional side view of the curved cover glass shown in FIG.
- the opening 15 provided in the bent portion 14 communicates the first surface 11 and the second surface 12 of the glass plate-like body 10a.
- the axis of the opening 15 that communicates the first surface 11 and the second surface 12 and the normal line of the first surface 11 at the portion where the opening 15 is provided coincide with each other.
- the present invention is not limited to this, and the two may not match.
- FIG. 8 is a partial side cross-sectional view showing another configuration example of the curved surface cover glass of the present embodiment. The curved cover glass shown in FIG.
- the glass plate-like body 10b shown in FIG. 8 is relative to the axis of the opening 15 that communicates the first surface 11 and the second surface 12, and the normal of the first surface 11 at the site where the opening 15 is provided. It is inclined.
- the opening provided in the bent portion when used as a cover glass for an automotive interior member or a display device.
- a connecting mechanism such as a bolt or an angle is inserted into the housing to connect a housing such as an automobile interior member or a display device and a glass plate-like body forming a curved cover glass.
- a housing such as an automobile interior member or a display device
- a glass plate-like body forming a curved cover glass.
- the reason for providing the opening in the bent portion defined above is not limited to this.
- an opening may be provided as a hole having functions such as a speaker, a switch, a ventilation hole, a storage area, and a slot area.
- the angle ⁇ formed by the axis of the opening 15 that communicates with the second surface 12 and the normal line of the first surface 11 at the portion where the opening 15 is provided is not particularly limited, but 0 ° ⁇ ⁇ ⁇ 60. And preferably 5 ° ⁇ ⁇ ⁇ 60 °.
- the angle ⁇ is more preferably 10 ° ⁇ ⁇ ⁇ 45 °, and further preferably 15 ° ⁇ ⁇ ⁇ 30 °.
- FIGS. 9A and 9B are diagrams showing one configuration example of the glass member of the present embodiment
- FIG. 9 (a) is a partial perspective view
- FIG. 9 (b) is a partial side sectional view. It is.
- the glass members shown in FIGS. 9A and 9B are a curved cover glass (glass plate 10a forming a curved cover glass) shown in FIGS. 7A and 7B, an automobile interior member, and a display device.
- Fig.9 (a) in order to make intelligible the positional relationship of the glass plate-shaped object 10a which makes
- the second surface 12 of the glass plate-like body 10a forming the curved cover glass and the display surface 21 of the housing 20 such as an automobile interior member or a display device are opposed to each other. Is arranged. A portion of the display surface 21 of the housing 20 that faces the bent portion 14 of the glass plate 10 a has a bent portion 22.
- a connection mechanism not shown
- the housing 20 such as a display device can be connected to the glass plate 10a that forms a curved cover glass.
- the shape of the second surface 12 of the glass plate 10a that forms the curved cover glass, the shape of the display surface 21 of the housing 20 such as an automobile interior member, a display device, are preferable from the viewpoint of improving the visibility.
- 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.
- 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 interior member for automobile or the casing of the display device or the like. It can be used as a judgment index for coincidence between the shape of the display surface and the shape of the second surface of the glass plate that forms the curved cover glass.
- the absolute value of the difference between the first radius of curvature R 1 and the radius of curvature in the same direction at the point opposite to is preferably 10% or less of the first radius of curvature R 1 , more preferably 5% or less. Preferably, it is 3% or less.
- FIGS. 10A and 10B are diagrams showing another configuration example of the curved cover glass of the present embodiment
- FIG. 10 (a) is a partial perspective view
- FIG. 10 (b) is a partial view. It is a sectional side view.
- the curved cover glass shown in FIGS. 10A and 10B connects the first surface 11, the second surface 12 facing the first surface 11, and the first surface 11 and the second surface 12. It consists of a glass plate-like body 10c having at least one end face 13.
- the glass plate-like body 10c shown in FIGS. 10 (a) and 10 (b) is the same as the glass plate-like body 10a shown in FIGS. 9 (a) and 9 (b).
- the bent portion 14 of the glass plate 10c shown in FIGS. 10A and 10B has at least one recess 16 (in the curved cover glass shown in FIGS. 10A and 10B, equal intervals in the Y-axis direction). Are aligned to form three recesses 16). Although this recessed part 16 has comprised the recessed part 16 in the 1st surface 11 of the glass plate-shaped body 10c, unlike the opening part 15 of the glass plate-shaped body 10a shown to Fig.9 (a), (b), a glass plate The first surface 11 and the second surface 12 of the cylindrical body 10c are not in communication.
- connection mechanism By fitting a connection mechanism (not shown) into the concave portion 16 provided in the bent portion 14 of the glass plate-like body 10c that forms the curved cover glass, a casing such as an automobile interior member or a display device, and a curved cover
- the glass plate-like body 10c that forms glass can be connected.
- a connection mechanism (not shown) into the concave portion 16 provided in the bent portion 14, a housing such as an automobile interior member or a display device, a glass plate-like body 10c forming a curved cover glass, Is required to have a certain depth in the concave portion 16 provided in the bent portion 14.
- the depth of the recess 16 provided in the bent portion 14 is preferably 0.5 mm or more, and more preferably 1 mm or more.
- the depth of the concave portion 16 provided in the bent portion 14 is set to the average thickness t of the glass plate forming the curved cover glass. It is preferably 0.7 ⁇ t or less, more preferably 0.6 ⁇ t or less, and further preferably 0.5 ⁇ t or less.
- FIGS. 11A and 11B are views showing another configuration example of the glass member of the present embodiment, FIG. 11A is a partial perspective view, and FIG. 11B is a partial side. It is sectional drawing.
- the glass members shown in FIGS. 11A and 11B are a curved cover glass (glass plate-like body 10c forming a curved cover glass) shown in FIGS. 10A and 10B, an automobile interior member, and a display device. Are connected to the housing 20.
- FIG. 11A is shown in a state where the glass plate-like body 10c forming the curved cover glass and the housing 20 are separated from each other for easy understanding.
- the second surface 12 of the glass plate-like body 10c forming the curved cover glass and the display surface 21 of the housing 20 such as an automobile interior member or a display device are opposed to each other. Is arranged.
- a portion of the display surface 21 of the housing 20 that faces the bent portion 14 of the glass plate 10 a has a bent portion 22.
- a connecting mechanism (not shown) is fitted into the recess 16 provided in the bent portion 14 of the glass plate-like body 10c forming the curved cover glass.
- a housing 20 such as a display device can be connected to a glass plate 10c that forms a curved cover glass.
- the recess 16 is formed on the first surface 11, but the recess 16 may be formed on the second surface 12.
- the recessed part 16 is formed in the 2nd surface 12, it can fit with the convex part provided in the housing
- FIGS. 12A and 12B are views showing still another example of the configuration of the curved cover glass of the present embodiment
- FIG. 12A is a partial perspective view
- FIG. It is a partial sectional side view.
- the curved cover glass shown in FIGS. 12A and 12B connects the first surface 11, the second surface 12 facing the first surface 11, and the first surface 11 and the second surface 12. It consists of a glass plate-like body 10d having at least one end face 13.
- the glass plate-like body 10d shown in FIGS. 12 (a) and 12 (b) is the same as the glass plate-like body 10c shown in FIGS. 10 (a) and 10 (b).
- the bent portion 14 has at least one concave portion 17 (in the glass plate-like body 10d shown in FIGS. 12A and 12B, equally spaced in the Y-axis direction). Are aligned to form three recesses 17).
- the two-dimensional projection shape of the concave portion 16 formed in the bent portion 14 is substantially circular, whereas in FIG. In the glass plate-like body 10d shown in (b), the two-dimensional projection shape of the concave portion 17 formed in the bent portion 14 is substantially semicircular.
- the concave portion 17 is formed in the bent portion 14 as in the glass plate-like body 10d shown in FIGS. 12A and 12B, the concave portion 17 is formed on the first surface 11 of the glass plate-like body 10d.
- the concave portion 17 can be formed in a portion adjacent to the end surface of the first surface 11.
- the two-dimensional projection shape can form a substantially semicircular or substantially semi-elliptical concave portion 17 by a procedure described later.
- the concave portion when the concave portion is formed at a position away from the end surface of the first surface 11, the concave portion whose two-dimensional projection shape is substantially circular or substantially elliptic can be formed by a procedure described later.
- the concave portion is preferably formed at a position separated from the end face of the first surface 11 by 10 mm or more, more preferably formed at a position separated by 15 mm or more, and further preferably formed at a position separated by 20 mm or more.
- FIGS. 13A and 13B are views showing another configuration example of the glass member of the present embodiment, FIG. 13A is a partial perspective view, and FIG. 13B is a partial side. It is sectional drawing.
- the glass members shown in FIGS. 13A and 13B are a curved cover glass (glass plate 10d forming a curved cover glass) shown in FIGS. 12A and 12B, an automobile interior member, and a display device. Are connected to the housing 20.
- FIG. 13A is shown in a state where the glass plate-like body 10d forming the curved cover glass and the housing 20 are separated from each other for easy understanding.
- the second surface 12 of the glass plate-like body 10d forming the curved cover glass and the display surface 21 of the housing 20 such as an automobile interior member or a display device are opposed to each other. Is arranged.
- a portion of the display surface 21 of the housing 20 that faces the bent portion 14 of the glass plate 10 a has a bent portion 22.
- a connecting mechanism (not shown) is fitted into a concave portion 17 provided in a bent portion 14 of a glass plate-like body 10d that forms a curved cover glass.
- a housing 20 such as a display device can be connected to a glass plate 10d that forms a curved cover glass.
- the maximum length in the two-dimensional projection shape of the concave portions 16 and 17 is 1.5 mm or more and 200 mm or less, so that the glass plate-like bodies 10c and 10d forming the curved cover glass have It is preferable from the viewpoint of preventing damage.
- the maximum length of the recesses 16 and 17 in the two-dimensional projection shape is more preferably 30 mm or less, and further preferably 10 mm or less.
- the first surface of the glass plate-like body forming the curved cover glass has the illustrated form. As such, it may be convex or concave.
- the first surface serving as a display surface is concave when used as a cover glass for an automobile interior member or a display device. It is preferable from the viewpoint of improving the visibility.
- the number thereof is There is no particular limitation, and there may be only one or a plurality.
- the opening or the recess The number is preferably plural.
- the plurality of openings or a plurality of recesses may have different roles.
- some of the openings or some of the recesses are fitted or fitted with a connection mechanism to form a casing such as an automobile interior member or a display device, and a glass plate-like body that forms a curved cover glass.
- the remaining openings or the remaining recesses may serve as a speaker or the like.
- the openings or the recesses that perform the respective functions may have different shapes and sizes.
- a louver used for air conditioning equipment, a metal member used for design or fixing, a resin member, decorative glass, etc. may be fitted in the opening or recess, and the activation button may be exposed from the opening. Good.
- 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. It is preferable to have a bent portion at any one point.
- 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 10,000 mm at any one point within the range of 50 mm from the end surface, and any one point within the range of 30 mm from the end surface
- the second curvature radius R 2 is more preferably in the range of 300 to 10000 mm.
- the maximum length in the two-dimensional projection shape of the first surface of the glass plate that forms 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 shape of the glass plate is the plane figure obtained by projecting the first surface of the glass plate that forms the curved cover glass onto the two-dimensional plane from an arbitrary direction. For the one having the largest area, the length of the largest straight line among the straight lines connecting any two points on the outline of the plane figure is indicated.
- the two-dimensional projection shape When the maximum length in the two-dimensional projection shape is 50 mm or more and 1,000 mm or less, the two-dimensional projection shape is not too small when used as a cover glass for an automobile interior member or a display device, and the viewing angle from the user Will not spread too much in the horizontal and / or vertical direction.
- 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 automotive interior members or display devices.
- the glass plate-like body that is chemically strengthened glass is chemically strengthened to form a compressive stress layer on the surface, and the strength and scratch resistance are enhanced.
- 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 the surface compressive stress (Compressive Stress: CS) and the depth of the compressive stress layer (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 Depth of Layer
- 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.
- a composition represented by mol (%) 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 is SiO 2 2 to 50 to 74%, Al 2 O 3 to 1 to 10%, Na 2 O to 6 to 14%, K 2 O to 3 to 11%, Li 2 O to 0 to 5.0%, MgO to 2 to 15%, CaO 0-6% and ZrO 2 0-5%, the total content of SiO 2 and Al 2 O 3 is 75% or less, the total content of Na 2 O and K 2 O is 12 to 25%, the composition total content of MgO and CaO is displayed in glass (iii) mol% is 7 to 15% of SiO 2 68 ⁇ 80%, Al 2 O 3 4-10 The Na 2 O 5 ⁇ 15%, the K 2
- the glass plate-like body that forms the curved cover glass is preferably formed from a flat plate glass into a predetermined shape.
- 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.
- the self-weight molding method after a plate glass is placed on a predetermined mold corresponding to the shape of the glass plate-shaped body after molding, 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-shaped body after forming, a clamp mold is set on the plate glass, and the periphery of the plate glass is sealed.
- 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 plate glass is installed between predetermined molds (lower mold, upper mold) according to the shape of the molded glass sheet, and the press load is applied between the upper and lower molds with the sheet glass softened. Is added, and the plate glass is bent and fitted into a mold to be molded into a predetermined shape.
- 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. According to 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 of unit area, which is preferable from the viewpoint of improving visibility.
- the molded glass plate may be reheated (annealed) to remove residual strain remaining on the glass plate. Thereby, not only a glass with less residual distortion can be obtained, but also uniform chemical strengthening can be achieved in the chemical strengthening step to be performed later.
- the opening or recess formed in the bent part of the glass plate shaped into a predetermined shape by the above-described procedure causes the drill equipped with a grindstone in the grinding part to rotate around the rotation axis and draw a spiral.
- the pitch at which the drill draws a spiral is preferably 0.1 to 5 mm, more preferably 0.2 to 4 mm, and more preferably 0.3 to More preferably, it is 3 mm.
- the radius of the revolving motion is preferably greater than the maximum diameter ⁇ 0.1 in the two-dimensional projection shape of the opening 15 or the recesses 16 and 17.
- the opening or recess formed by using a drill has a state in which the end surface has a sharp edge. Therefore, the end surface, that is, the end surface on the first surface side and the end surface on the second surface side of the opening, The end surface on the first surface side is preferably chamfered or etched.
- the chemical strengthening process may be performed after forming the opening or the recess (drilling process). Thereby, since the chemical strengthening is performed after the opening or the recess is formed, the end face of the hole is also chemically strengthened, and a high-strength curved cover glass is obtained. Further, after the drilling step, the end face of the hole may be chamfered or polished.
- a curved cover glass with higher strength can be obtained.
- it may be perforated after the chemical strengthening step. Further, printing may be performed, and this printing process may be performed before or after any of the above processes.
- the glass plate-like body that forms the curved cover glass has various functional films as necessary on the first surface of the glass plate-like body that serves as a display surface when used as a cover glass for automobile interior members or display devices. It may be formed. Specific examples of such a functional film include an antiglare film, an antireflection film, and an antifouling film. These functional films 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 preferably 40% or less, more preferably 30% or less, and 20% or less. More preferably. When the haze value is 40% or less, a decrease in contrast is sufficiently suppressed.
- the static friction coefficient of the bent portion of the first surface is preferably 1.0 or less, and 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.
- the glass of the present invention can be used for both exterior members and interior members, including cover glasses provided on the outer surface of electronic devices such as display devices, touch panels, sensors, etc., not only electronic devices, decorative products, building materials, You may provide in the outer surface of furniture, the operation panel of a motor vehicle, an emblem, and interior goods.
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Abstract
Description
曲面ガラスをカバーガラスとして使用する場合に、カバーガラスの固定手段として、この手順を適用した場合、曲面ガラスに開口部を形成することが困難であり、また、開口部を形成する際にガラスが破損するおそれがある。
(1) 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、
前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記ガラス板状体に、前記第1面と前記第2面とを連通する、少なくとも一つの開口部が設けられている曲面カバーガラス。
(2) 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、
前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記屈曲部に、前記第1面と前記第2面とを連通する、少なくとも一つの開口部が設けられていることを特徴とする曲面カバーガラス。
(3) 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記ガラス板状体に、二次元投影形状が略円形、略楕円形、略半円形状、若しくは、略半楕円形状であり、該二次元投影形状における最大長が1.5~200mmであり、少なくとも一つの凹部が設けられている曲面カバーガラス。
(4) 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記屈曲部に、二次元投影形状が略円形、略楕円形、略半円形状、若しくは、略半楕円形状であり、該二次元投影形状における最大長が1.5~200mmであり、少なくとも一つの凹部が設けられていることを特徴とする曲面カバーガラス。
(5)上記(1)または(2)の曲面カバーガラスと、筐体と、を有するガラス部材であって、
前記筐体は、前記曲面カバーガラスの前記開口部に嵌通して、前記曲面カバーガラスと前記筐体とを接続する、少なくとも1つの接続機構を有するガラス部材。
(6)上記(3)または(4)の曲面カバーガラスと、筐体と、を有するガラス部材であって、
前記筐体は、前記曲面カバーガラスの前記凹部に嵌合して、前記曲面カバーガラスと前記筐体とを接続する、少なくとも1つの接続機構を有するガラス部材。
(7)上記(1)~(4)のいずれか一つの曲面カバーガラスと、ディスプレイ装置と、を備えた表示装置。
(8)上記(1)または(2)の曲面カバーガラスを製造する曲面カバーガラスの製造方法であって、
研削部に砥石を備えたドリルを、回転軸を中心として自転させるとともに、らせんを描くように前記第1面と前記第2面とを連通する軸を中心として公転運動させて開口部を形成する曲面カバーガラスの製造方法。
(9)上記(3)または(4)の曲面カバーガラスを製造する曲面カバーガラスの製造方法であって、
研削部に砥石を備えたドリルを、回転軸を中心として自転させるとともに、らせんを描くように前記第1面と前記第2面とを連通する軸を中心として公転運動させて前記凹部を形成する曲面カバーガラスの製造方法。
(10) 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、
前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記ガラス板状体に、前記第1面と前記第2面とを連通する、少なくとも一つの開口部が設けられている曲面ガラス。
(11) 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記ガラス板状体に、二次元投影形状が略円形、略楕円形、略半円形状、若しくは、略半楕円形状であり、該二次元投影形状における最大長が1.5~200mmであり、少なくとも一つの凹部が設けられている曲面ガラス。
また、当該ガラス板状体の2つの主面のうち、いずれの主面を第1面若しくは第2面とするかは特に限定されないが、自動車用内装部品やディスプレイ装置等のカバーガラスとして使用する場合、外部に露出する側の面、すなわち、表示面となる側の面を、ガラス板状体の第1面とする。この場合、自動車用内装部品やディスプレイ装置等の表示面と対向する面がガラス板状体の第2面である。そして、自動車用内装部品やディスプレイ装置等の表示面と、ガラス板状体の第2面と、を対向させた状態で、自動車用内装部品やディスプレイ装置等の筐体に設けられた接続機構を、曲面カバーガラスをなすガラス板状体10aの開口部15に嵌通させて、曲面カバーガラスをなすガラス板状体10aと、自動車用内装部品やディスプレイ装置等の筐体と、を接続する。
曲面カバーガラスをなすガラス板状体の第1面は、第1面上の少なくとも1点において該X軸方向にその表面が屈曲した屈曲部を有する。屈曲部とは、第1面上の任意の点Pにおいて該XZ平面における第1曲率半径R1が10000mm以下となる領域を指す。なお、図2では、第1面110全体が屈曲部をなしている。
第1曲率半径R1が10000mm以下の屈曲部を有していると、自動車用内装部材若しくはディスプレイ装置等のカバーガラスとして使用した場合に、これらの表示面上に配置される部位が適度に屈曲しているため、利用者からの視野角が小さくなり、視認性が向上する。
視認性の向上の観点からは、屈曲部の第1曲率半径R1は300~3000mmの範囲内であることが好ましく、500~2000mmの範囲内であることがより好ましい。
図3は、曲面カバーガラスをなすガラス板状体の厚みtを説明するための図である。但し、図3に示す曲面カバーガラスは、屈曲部に開口部が設けられていないため、本実施形態の曲面カバーガラスではない。
図3に示すガラス板状体100は、第1面110と、該第1面110に対向する第2面120と、該第1面110と該第2面120を接続する少なくとも一つの端面130を有する。
本明細書において、第1面における任意の点Pにおける該ガラス板状体の厚みtとは、図3に示す通り、第1面110における任意の点Pと、点Pにおける第1面110に対する法線とガラス板状体の第2面120との交点Qと、を結ぶ最短距離とする。
本実施形態の曲面カバーガラスは、曲面カバーガラスをなすガラス板状体の平均厚みtaveが5mm以下である。軽量化の観点、タッチパネルなどのセンシングの観点から曲面カバーガラスをなすガラス板状体の平均厚みtaveが2mm以下であることが好ましく、1.5mm以下であることがより好ましく、1.0mm以下であることがさらに好ましく、0.7mm以下であることが特に好ましい。
具体的には、ガラス板状体の屈曲部における厚みの最大値tmaxと、最小値tminと、の比tmax/tminが1.0~1.5であることが好ましく、1.0~1.1であることがより好ましい。
本明細書において、第1曲率半径R1が10000mm超の部位を屈曲していない略平坦部、曲率半径が300mm未満の部位を特異屈曲部とする。図4に示すガラス板状体10aにおいて、第1面11のうち、屈曲部14をなす図中右側の端面に近い部位以外の部位は略平坦部である。
屈曲部14に設けられる開口部15は、第1面11の端面から10mm以上離れた位置に設けられていることがより好ましく、20mm以上離れた位置に設けられていることがさらに好ましい。
開口部15の二次元投影形状における最大径dは30mm以下であることがより好ましく、10mm以下であることがさらに好ましい。図5は、曲面カバーガラスをなすガラス板状体の第1面を二次元平面に任意の方向から投影して得られた平面図形を示す説明図である。
開口部15の二次元投影形状における最大径dとは、図5に示すように、投影して得られた平面図形31のうち、開口部15に相当する領域33の面積が最大のものについて、その開口部15に相当する平面図形の輪郭上の任意の2点K1,K2を結ぶ直線のうち最大の直線の長さ、を指す。
なお、曲面カバーガラスをなすガラス板状体10aに後述する手順で開口部15を形成する場合、該開口部15の二次元投影形状は略円形、略楕円形、略半円形状、若しくは、略半楕円形状となる。
また、開口部15の二次元投影形状における最大径dは、第1面11側と、第2面12側で異なっていてもよい。この場合、開口部15は、ガラス板状体10aの厚み方向において、最大径dが異なるテーパー形状をなす。
二次元投影形状における開口部15の最大径dと屈曲部14の最大長Lとの比d/Lは、0.5以下であることがより好ましく、0.4以下であることがさらに好ましい。
図8は、本実施形態の曲面カバーガラスの別の一構成例を示した部分側断面図である。図8に示す曲面カバーガラスは、曲面カバーガラスをなすガラス板状体10bの屈曲部14に設けられた開口部15の向きが、図7(b)に示したガラス板状体10aとは異なっている。図8に示すガラス板状体10bは、第1面11と第2面12とを連通する開口部15の軸と、開口部15が設けられた部位における第1面11の法線に対して傾斜している。
以下、本明細書において、自動車用内装部材若しくはディスプレイ装置等の筐体と、曲面カバーガラスをなすガラス板状体と、を接続したものを総称して本発明のガラス部材とする。
屈曲部に設けた開口部に接続機構を嵌通させて、自動車用内装部材若しくはディスプレイ装置等の筐体と、曲面カバーガラスをなすガラス板状体と、を接続する場合、第1面11と第2面12とを連通する開口部15の軸と、開口部15が設けられた部位における第1面11の法線との、なす角度θは特に制限はないが、0°≦θ≦60°であり、5°≦θ≦60°であることが好ましい。上記角度θは、10°≦θ≦45°であることがより好ましく、15°≦θ≦30°であることがさらに好ましい。
図9(a)、(b)において、曲面カバーガラスをなすガラス板状体10aの第2面12と、自動車用内装部材、ディスプレイ装置等の筐体20の表示面21と、が対向するように配置されている。筐体20の表示面21のうち、ガラス板状体10aの屈曲部14と対向する部位は、屈曲部22を有している。
図9(a)、(b)において、曲面カバーガラスをなすガラス板状体10aの屈曲部14に設けた開口部15に接続機構(図示せず)を嵌通させることにより、自動車用内装部材若しくはディスプレイ装置等の筐体20と、曲面カバーガラスをなすガラス板状体10aと、が接続できる。
本実施形態の曲面カバーガラスは、上述したように、曲面カバーガラスをなすガラス板状体の厚みtが小さいため、第1面の屈曲部における曲率半径(第1曲率半径R1、第2曲率半径R2)と、第1面に対向する第2面における曲率半径と、の差が小さい。そのため、曲面カバーガラスをなすガラス板状体の第1面の屈曲部における曲率半径(第1曲率半径R1、第2曲率半径R2)を、自動車用内装部材若しくはディスプレイ装置等の筐体の表示面の形状と、曲面カバーガラスをなすガラス板状体の第2面の形状と、の一致の判断指標とすることができる。曲面カバーガラスをなすガラス板状体の第1面の屈曲部上の任意の点Pにおける第1曲率半径R1と、自動車用内装部材若しくはディスプレイ装置等の筐体の表示面の部位における点Pに対向する点において第1曲率半径R1と同方向の曲率半径と、の差の絶対値が、第1曲率半径R1の10%以下であることが好ましく、5%以下であることがより好ましく、3%以下であることがさらに好ましい。
図10(a)、(b)に示す曲面カバーガラスは、第1面11と、該第1面11に対向する第2面12と、該第1面11と該第2面12を接続する少なくとも一つの端面13を有するガラス板状体10cからなる。図10(a)、(b)に示すガラス板状体10cは、図9(a)、(b)に示すガラス板状体10aと同様に、第1面11のうち、図中右側の端面に近い部位のみが屈曲部14をなしている。図10(a)、(b)に示すガラス板状体10cの屈曲部14には、少なくとも一つの凹部16(図10(a)、(b)に曲面カバーガラスでは、Y軸方向に等間隔で整列して3つの凹部16)が形成されている。該凹部16は、ガラス板状体10cの第1面11において凹部16をなしているが、図9(a)、(b)に示すガラス板状体10aの開口部15とは違い、ガラス板状体10cの第1面11と第2面12とを連通していない。曲面カバーガラスをなすガラス板状体10cの屈曲部14に設けた凹部16に接続機構(図示せず)を嵌合させることによっても、自動車用内装部材若しくはディスプレイ装置等の筐体と、曲面カバーガラスをなすガラス板状体10cと、を接続できる。
但し、屈曲部14に設けた凹部16に接続機構(図示せず)を嵌合させることによって、自動車用内装部材若しくはディスプレイ装置等の筐体と、曲面カバーガラスをなすガラス板状体10cと、を接続するためには、屈曲部14に設けた凹部16がある程度の深さを有することが求められる。具体的には、屈曲部14に設けた凹部16の深さは、0.5mm以上であることが好ましく、1mm以上であることがより好ましい。
一方、曲面カバーガラスをなすガラス板状体10cの破損防止の観点からは、屈曲部14に設けた凹部16の深さは、曲面カバーガラスをなすガラス板状体の平均厚みtに対して、0.7×t以下であることが好ましく、0.6×t以下であることがより好ましく、0.5×t以下であることがさらに好ましい。
図11(a)、(b)において、曲面カバーガラスをなすガラス板状体10cの第2面12と、自動車用内装部材、ディスプレイ装置等の筐体20の表示面21と、が対向するように配置されている。筐体20の表示面21のうち、ガラス板状体10aの屈曲部14と対向する部位は、屈曲部22を有している。
図11(a)、(b)において、曲面カバーガラスをなすガラス板状体10cの屈曲部14に設けた凹部16に接続機構(図示せず)を嵌合させることにより、自動車用内装部材若しくはディスプレイ装置等の筐体20と、曲面カバーガラスをなすガラス板状体10cと、が接続できる。
なお、図11では第1面11に凹部16が形成されているが、第2面12に凹部16が形成されてもよい。第2面12に凹部16が形成されているときには筐体20に設けられた凸部と嵌合でき、簡単にガラス板状体が固定される。
図12(a)、(b)に示す曲面カバーガラスは、第1面11と、該第1面11に対向する第2面12と、該第1面11と該第2面12を接続する少なくとも一つの端面13を有するガラス板状体10dからなる。図12(a)、(b)に示すガラス板状体10dは、図10(a)、(b)に示すガラス板状体10cと同様に、第1面11のうち、図中右側の端面に近い部位のみが屈曲部14をなしており、該屈曲部14には、少なくとも一つの凹部17(図12(a)、(b)に示すガラス板状体10dでは、Y軸方向に等間隔で整列して3つの凹部17)が形成されている。但し、図10(a)、(b)に示すガラス板状体10cでは、屈曲部14に形成された凹部16の二次元投影形状が略円形であるのに対して、図12(a)、(b)に示すガラス板状体10dでは、屈曲部14に形成された凹部17の二次元投影形状が略半円形である。
図4に示すガラス板状体10aのように、屈曲部14に開口部15を設ける場合は、ガラス板状体10aの破損防止の観点から、第1面11の端面から5mm以上離れた位置に開口部15を設けることが好ましい。しかし、図12(a)、(b)に示すガラス板状体10dのように、屈曲部14に凹部17を形成する場合、ガラス板状体10dの第1面11においては凹部17をなしているが、ガラス板状体10dの第1面11と第2面12とを連通していないため、第1面11の端面に隣接する部位に凹部17を形成できる。そのため、後述する手順により、二次元投影形状は略半円形や略半楕円形状の凹部17を形成できる。一方、第1面11の端面から離れた位置に凹部を形成する場合には、後述する手順により、二次元投影形状が略円形、若しくは、略楕円形状の凹部を形成できる。この場合、第1面11の端面から10mm以上離れた位置に凹部を形成することが好ましく、15mm以上離れた位置に形成することがより好ましく、20mm以上離れた位置に形成することがさらに好ましい。
図13(a)、(b)において、曲面カバーガラスをなすガラス板状体10dの第2面12と、自動車用内装部材、ディスプレイ装置等の筐体20の表示面21と、が対向するように配置されている。筐体20の表示面21のうち、ガラス板状体10aの屈曲部14と対向する部位は、屈曲部22を有している。
図13(a)、(b)において、曲面カバーガラスをなすガラス板状体10dの屈曲部14に設けた凹部17に接続機構(図示せず)を嵌合させることにより、自動車用内装部材若しくはディスプレイ装置等の筐体20と、曲面カバーガラスをなすガラス板状体10dと、が接続できる。
凹部16、17の二次元投影形状における最大長は30mm以下であることがより好ましく、10mm以下であることがさらに好ましい。
(ii)モル%で表示した組成が、SiO2を50~74%、Al2O3を1~10%、Na2Oを6~14%、K2Oを3~11%、Li2Oを0~5.0%、MgOを2~15%、CaOを0~6%及びZrO2を0~5%含有し、SiO2及びAl2O3の含有量の合計が75%以下、Na2O及びK2Oの含有量の合計が12~25%、MgO及びCaOの含有量の合計が7~15%であるガラス
(iii)モル%で表示した組成が、SiO2を68~80%、Al2O3を4~10%、Na2Oを5~15%、K2Oを0~1%、Li2Oを0~5.0%、MgOを4~15%及びZrO2を0~1%含有するガラス(iv)モル%で表示した組成が、SiO2を67~75%、Al2O3を0~4%、Na2Oを7~15%、K2Oを1~9%、Li2Oを0~5.0%、MgOを6~14%及びZrO2を0~1.5%含有し、SiO2及びAl2O3の含有量の合計が71~75%、Na2O及びK2Oの含有量の合計が12~20%であり、CaOを含有する場合その含有量が1%未満であるガラス。
自重成形法は、成形後のガラス板状体の形状に応じた所定の金型上に板ガラスを設置した後、該板ガラスを軟化させて、重力により板ガラスを曲げて金型になじませて、所定の形状に成形する方法である。
真空成形法は、板ガラスを軟化させた状態で板ガラスの表裏面に差圧を与えて、板ガラスを曲げて金型になじませて、所定の形状に成形する方法である。真空成形法では、成形後のガラス板状体の形状に応じた所定の金型上に板ガラスを設置し、該板ガラス上にクランプ金型を設置し、板ガラスの周辺をシールした後、金型と板ガラスとの空間をポンプで減圧することにより、板ガラスの表裏面に差圧を与える。この際に、補助的に、板ガラスの上面側を加圧してもよい。
プレス成形は、成形後のガラス板状体の形状に応じた所定の金型(下型、上型)間に板ガラスを設置し、板ガラスを軟化させた状態で、上下の金型間にプレス荷重を加えて、板ガラスを曲げて金型になじませて、所定の形状に成形する方法である。
中でも真空成形法は、曲面カバーガラスをなすガラス板状体を所定の形状に成形する方法として特に好ましい。真空成形法によれば、ガラス板状体の対向する二つの主面のうち、一方の主面は成形型と接触せずに成形できるため、傷、へこみなどの凹凸状欠点を減らせる。この成形型と接触しない側の主面を第1面とすることで、第1面における特異屈曲部を単位面積1mm2あたり10箇所以下とすることができ、視認性向上の観点から好ましい。
なお、成形後のガラス板状体の形状に応じて、2種以上の成形法を併用してもよい。
また成形後のガラス板状体を再加熱(アニール)し、ガラス板状体に残る残留歪みを除いてもよい。これにより、残留歪みの少ないガラスが得られるだけでなく、この後に実施する化学強化工程において、均一な化学強化を達成できる。
ドリルを用いて形成される開口部若しくは凹部は、その端面が鋭いエッジを持った状態となるため、その端面、すなわち、開口部の第1面側の端面及び第2面側の端面、凹部の第1面側の端面には面取り加工やエッチングを施すことが好ましい。
他の工程として、開口部若しくは凹部を形成(孔あけ工程)した後に、化学強化工程を実施してもよい。これにより、開口部または凹部を形成した後に化学強化が実施されるため、孔の端面も化学強化され高強度の曲面カバーガラスが得られる。さらに孔あけ工程後、孔の端面を面取りや研磨を実施してもよい。これにより強度に関わるクラックを除去できより高強度の曲面カバーガラスが得られる。但し、強度を要求されない曲面カバーガラスでは、化学強化工程後に孔あけ加工しても良い。さらには、印刷を実施してもよく、この印刷工程は前記いずれの工程の前後に実施してもよい。
ガラス板状体の第1面に防眩膜が形成されている場合、第1面の屈曲部のヘイズが40%以下であることが好ましく、30%以下であることがより好ましく、20%以下であることがさらに好ましい。ヘイズ値が40%以下であれば、コントラストの低下が充分に抑えられる。
ガラス板状体の第1面に防汚膜が形成されている場合、第1面の屈曲部の静止摩擦係数が1.0以下であることが好ましく、0.9以下であることがより好ましく、0.8以下であることがさらに好ましい。静止摩擦係数が1.0以下であれば、人間の指が第1面の屈曲部に触れる際に指滑り性が良い。また、第1面の屈曲部の動摩擦係数が0.02以下であることが好ましく、0.015以下であることがより好ましく、0.01以下であることがさらに好ましい。動摩擦係数が0.02以下であれば、人間の指が第1面の屈曲部に触れる際に指滑り性が良い。
11:第1面
12:第2面
13:端面
14:屈曲部
15:開口部
16,17:凹部
20:筐体
21:表示面
22:屈曲部
100:ガラス板状体
110:第1面
120:第2面
130:端面
Claims (27)
- 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、
前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記ガラス板状体に、前記第1面と前記第2面とを連通する、少なくとも一つの開口部が設けられている曲面カバーガラス。 - 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、
前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記屈曲部に、前記第1面と前記第2面とを連通する、少なくとも一つの開口部が設けられていることを特徴とする曲面カバーガラス。 - 前記開口部の二次元投影形状における最大径dが50mm以下である、請求項1または2に記載の曲面カバーガラス。
- 前記第1面の二次元投影形状における前記屈曲部の最大長L(mm)に対する、前記開口部の二次元投影形状における最大径d(mm)の比d/Lが0.6以下である、請求項1~3のいずれか1項に記載の曲面カバーガラス。
- 前記開口部において、前記第1面と前記第2面とを連通する軸と、前記開口部が設けられた部位における前記第1面の法線と、がなす角度θが、0°≦θ≦60°である、請求項1~4のいずれか1項に記載の曲面カバーガラス。
- 前記開口部において、前記第1面と前記第2面とを連通する軸と、前記開口部が設けられた部位における前記第1面の法線と、がなす角度θが、5°≦θ≦60°である、請求項1~4のいずれか1項に記載の曲面カバーガラス。
- 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記ガラス板状体に、二次元投影形状が略円形、略楕円形、略半円形状、若しくは、略半楕円形状であり、該二次元投影形状における最大長が1.5~200mmであり、少なくとも一つの凹部が設けられている曲面カバーガラス。 - 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記屈曲部に、二次元投影形状が略円形、略楕円形、略半円形状、若しくは、略半楕円形状であり、該二次元投影形状における最大長が1.5~200mmであり、少なくとも一つの凹部が設けられていることを特徴とする曲面カバーガラス。 - 前記凹部が、前記第1面の端面に隣接する部位ないしは前記第1面の端面から5mm以上離れた部位に設けられている、請求項7または8に記載の曲面カバーガラス。
- 前記第1面のうち、少なくとも端面と隣接する部位における任意の1点において、若しくは、端面から100mm以内の範囲にある任意の1点において、前記屈曲部を有し、該屈曲部に少なくとも一つの前記開口部が設けられている、請求項1~6のいずれか1項に記載の曲面カバーガラス。
- 前記第1面のうち、少なくとも端面と隣接する部位における任意の1点において、若しくは、端面から100mm以内の範囲にある任意の1点において、前記屈曲部を有し、該屈曲部に少なくとも一つの前記凹部が設けられている、請求項7~9のいずれか1項に記載の曲面カバーガラス。
- 前記屈曲部上の少なくとも1点において、前記Y軸方向にもその表面が屈曲しており、前記Y軸と前記Z軸を通るYZ平面におけるガラス板状体の第1面の断面の第2曲率半径R2が300~10000mmである、請求項1~11のいずれか1項に記載の曲面カバーガラス。
- 前記第1面上において、前記第1曲率半径R1が300mm未満である特異屈曲部が、単位面積1mm2あたり10箇所以下である、請求項1~12のいずれか1項に記載の曲面カバーガラス。
- 前記ガラス板状体が化学強化されている、請求項1~13のいずれか1項に記載の曲面カバーガラス。
- 前記第1面の表面圧縮応力の最大値が600MPa以上である、請求項14に記載の曲面カバーガラス。
- 請求項1~6、10のいずれか1項に記載の曲面カバーガラスと、筐体と、を有するガラス部材であって、
前記筐体は、前記曲面カバーガラスの前記開口部に嵌通して、前記曲面カバーガラスと前記筐体とを接続する、少なくとも1つの接続機構を有するガラス部材。 - 請求項7~9、11のいずれか1項に記載の曲面カバーガラスと、筐体と、を有するガラス部材であって、
前記筐体は、前記曲面カバーガラスの前記凹部に嵌合して、前記曲面カバーガラスと前記筐体とを接続する、少なくとも1つの接続機構を有するガラス部材。 - 請求項1~15のいずれか1項に記載される曲面カバーガラスと、ディスプレイ装置と、を備えた表示装置。
- 請求項1~6、10のいずれか1項に記載の曲面カバーガラスを製造する曲面カバーガラスの製造方法であって、
研削部に砥石を備えたドリルを、回転軸を中心として自転させるとともに、らせんを描くように前記第1面と前記第2面とを連通する軸を中心として公転運動させて前記開口部を形成する曲面カバーガラスの製造方法。 - 請求項7~9,11のいずれか1項に記載の曲面カバーガラスを製造する曲面カバーガラスの製造方法であって、
研削部に砥石を備えたドリルを、回転軸を中心として自転させるとともに、らせんを描くように前記第1面と前記第2面とを連通する軸を中心として公転運動させて前記凹部を形成する曲面カバーガラスの製造方法。 - 前記開口部の端面が面取りされている、請求項19に記載の曲面カバーガラスの製造方法。
- 前記凹部の端面が面取りされている、請求項20に記載の曲面カバーガラスの製造方法。
- 真空成形法により前記ガラス板状体を成形する請求項19~22のいずれか1項に記載の曲面カバーガラスの製造方法。
- 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、
前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記ガラス板状体に、前記第1面と前記第2面とを連通する、少なくとも一つの開口部が設けられている曲面ガラス。 - 第1面と、
前記第1面に対向する第2面と、
前記第1面と前記第2面を接続する少なくとも一つの端面を有するガラス板状体からなり、前記ガラス板状体の平均厚みtaveが5mm以下であり、
前記第1面上の任意の点からの接線方向をX軸とし、前記第1面の中心からの接線方向のうち、前記X軸に直交する方向をY軸とし、前記X軸と前記Y軸に直交する方向をZ軸とするとき、
前記X軸は、前記第1面上の任意の点における前記第1面の接線方向のうち、前記X軸と前記Z軸を通るXZ平面における前記第1面の断面の第1曲率半径R1が最小となる方向であり、
前記第1面は、前記第1面上の少なくとも1点において前記X軸方向にその表面が屈曲した屈曲部を有しており、第1曲率半径R1が10000mm以下であり、
前記ガラス板状体に、二次元投影形状が略円形、略楕円形、略半円形状、若しくは、略半楕円形状であり、該二次元投影形状における最大長が1.5~200mmであり、少なくとも一つの凹部が設けられている曲面ガラス。 - 前記ガラス板状体が化学強化ガラスである、請求項24または25に記載の曲面ガラス。
- 前記第1面の表面圧縮応力の最大値が600MPa以上である、請求項26に記載の曲面ガラス。
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Also Published As
Publication number | Publication date |
---|---|
TWI725013B (zh) | 2021-04-21 |
CN112047624B (zh) | 2022-09-23 |
CN107406291B (zh) | 2020-07-28 |
TW201637857A (zh) | 2016-11-01 |
CN107406291A (zh) | 2017-11-28 |
DE112016000910T5 (de) | 2017-11-16 |
US11198634B2 (en) | 2021-12-14 |
JP6579191B2 (ja) | 2019-09-25 |
CN112047624A (zh) | 2020-12-08 |
JPWO2016136758A1 (ja) | 2018-01-11 |
US20170349473A1 (en) | 2017-12-07 |
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