WO2023127669A1 - ガラス、ガラス構造体及び車載用表示装置 - Google Patents

ガラス、ガラス構造体及び車載用表示装置 Download PDF

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Publication number
WO2023127669A1
WO2023127669A1 PCT/JP2022/047245 JP2022047245W WO2023127669A1 WO 2023127669 A1 WO2023127669 A1 WO 2023127669A1 JP 2022047245 W JP2022047245 W JP 2022047245W WO 2023127669 A1 WO2023127669 A1 WO 2023127669A1
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WO
WIPO (PCT)
Prior art keywords
region
glass
thin
main surface
thick
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/JP2022/047245
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
祐司 井本
祐輔 藤原
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
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP2023570920A priority Critical patent/JPWO2023127669A1/ja
Priority to CN202280086155.4A priority patent/CN118475543A/zh
Priority to EP22915892.8A priority patent/EP4458783A4/en
Publication of WO2023127669A1 publication Critical patent/WO2023127669A1/ja
Priority to US18/752,898 priority patent/US20240345432A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133331—Cover glasses
    • 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
    • B32B1/00—Layered products having a non-planar shape
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • 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
    • B32B3/263—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 a layer having non-uniform thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/22—Display screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/50—Instruments characterised by their means of attachment to or integration in the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/55—Instruments with parts that can change their shape or position to configure an active screen, e.g. by folding or by rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
    • 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
    • C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
    • 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
    • C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
    • C03C23/0005—Other surface treatment of glass not in the form of fibres or filaments by irradiation
    • C03C23/0025—Other surface treatment of glass not in the form of fibres or filaments by irradiation by a laser beam
    • 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
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/143—Touch sensitive instrument input devices
    • B60K2360/1434—Touch panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/92—Manufacturing of instruments
    • B60K2360/96—Manufacturing of instruments by assembling
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements

Definitions

  • the present invention relates to glass, a glass structure, and an in-vehicle display device.
  • Liquid crystal displays and organic EL displays may be used in in-vehicle display devices that display information necessary for driving. These displays are sometimes provided with a cover glass to protect the front surface. Further, in recent years, there has been a demand for high designability in the interior of a vehicle, and a cover glass having a curved surface shape is required. As for the glass that can be bent, there is known a glass provided with regions having different thicknesses, as disclosed in Patent Document 1, for example.
  • the present invention has been made in view of the above problems, and aims to provide sufficiently bendable glass, a glass structure, and an in-vehicle display device.
  • the glass according to the present invention is a glass having a first main surface and a second main surface opposite to the first main surface, the glass has a thick region and a thin region adjacent to the thick region and thinner than the thick region with the second main surface being a concave surface, the thin region covering the first main surface It includes a bottom region having a flat surface on the second main surface side when fixed so as to contact the flat surface, and a stepped region provided between the bottom region and the thick region, and the thin region includes: It satisfies the formula (1).
  • the glass structure according to the present invention has the glass and a filler filled on the thin region of the glass.
  • an in-vehicle display device has a display and the glass structure.
  • sufficiently bendable glass can be provided.
  • FIG. 1 is a cross-sectional view showing an in-vehicle display device according to this embodiment.
  • FIG. 2 is a schematic diagram of the glass structure according to the present embodiment in a folded state.
  • FIG. 3 is a schematic top view of the glass according to this embodiment in a state of being fixed in contact with a flat surface.
  • 4 is a cross-sectional view taken along line AA of FIG. 3.
  • FIG. 5 is a diagram showing an example of an enlarged view in which area C in FIG. 4 is enlarged.
  • FIG. 6 is a diagram showing another example of an enlarged view in which the area C in FIG. 4 is enlarged.
  • FIG. 7 is a diagram showing another example of an enlarged view in which the region C in FIG. 4 is enlarged.
  • FIG. 5 is a diagram showing an example of an enlarged view in which the region C in FIG. 4 is enlarged.
  • FIG. 8 is a diagram showing another example of an enlarged view in which area C in FIG. 4 is enlarged.
  • FIG. 9 is a diagram showing another example of a schematic top view of the glass according to this embodiment in a state of being fixed in contact with a flat surface.
  • 10 is a diagram showing a cross section of the cover glass of Example 1.
  • FIG. 11 is a diagram showing a cross section of the cover glass of Example 2.
  • FIG. 12 is a diagram showing a cross section of the cover glass of Example 3.
  • FIG. 13 is a diagram showing a cross section of the cover glass of Example 4.
  • FIG. 14 is a diagram showing a cross section of the cover glass of Example 5.
  • FIG. 15 is a diagram showing a cross section of the cover glass of Example 6.
  • FIG. 16 is a diagram showing a cross section of the cover glass of Example 7.
  • FIG. 17 is a diagram showing a cross section of the cover glass of Example 8.
  • FIG. 18 is a diagram showing a cross section of the cover glass of Example 9.
  • FIG. 1 is a cross-sectional view showing an in-vehicle display device according to this embodiment.
  • the in-vehicle display device 1 is a display device that is mounted in a vehicle and used. It has a CID (Center Information Display) placed in front between the seat and the front passenger seat.
  • the cluster includes a display 22, a display 23, and a display 24 arranged in a concave portion of the substrate 30.
  • the display 25 is arranged on the plane portion of the substrate 30 of the CID.
  • Each display 22-25 is, for example, a liquid crystal panel.
  • a backlight unit is arranged on the back side of each liquid crystal panel.
  • Each of the displays 22 to 25 is not limited to this, and may be, for example, an organic EL panel, a PDP (Plasma Display Panel), an electronic ink panel, or the like, and may have a touch panel or the like.
  • the glass structure 10 is used as a cover glass for covering the displays 22-25 in this embodiment.
  • the second main surface 10B of the glass structure 10 is bonded to the display 25 via OCA (Optical Clear Adhesive) or OCR (Optical Clear Resin) (not shown).
  • the glass structure 10 is attached to the display 22, the display 23, and the display 24 via an OCA (not shown) on the second main surface 10B elastically deformed into a convex shape.
  • OCA not shown
  • the glass structure 10 has sufficient impact resistance so that it will not break even if a passenger collides with it in the event of a vehicle collision.
  • the configuration of FIG. 1 is an example, and the vehicle-mounted display device 1 to which the glass structure 10 is applied may have any configuration.
  • the displays 22 to 25 are so-called rollable displays whose screen shapes can be changed by winding and unfolding. ) can be rolled up and unfolded as a cover material.
  • the displays 22 to 25 may be movable displays that are partially or entirely folded and unfolded by a mechanism provided in the in-vehicle display device 1 .
  • the glass structure 10 for example, has a thick region 110, which will be described later, bonded to the displays 22 to 25 via a frame or the like, and is held in a state in which it can be folded and unfolded. There may be.
  • the glass structure 10 is not limited to being used as a cover material for the surface of the in-vehicle display device 1, and may be used for any purpose.
  • FIG. 2 is a schematic diagram of the glass structure 10 according to the present embodiment in a folded state.
  • glass structure 10 has glass 100 and filler 200 .
  • the glass 100 has a first principal surface 100A and a second principal surface 100B opposite to the first principal surface 100A.
  • the filler 200 is filled in the space above the thin region 120 of the glass 100, and details thereof will be described later.
  • the glass structure 10 is bent so that the second main surface 10B on which the filler 200 is provided becomes convex. That is, when the glass 100 is mounted on the vehicle-mounted display device 1 shown in FIG. 1, the first main surface 100A is the side exposed to the outside, and the second main surface 100B is the side facing the displays 22-25.
  • FIG. 3 is a schematic top view of the glass according to the present embodiment in a state in which the first main surface is fixed so as to be in contact with the flat surface
  • FIG. 4 is a cross-sectional view taken along the line AA in FIG. be.
  • the glass 100 is flat in a state where the first main surface 100A is in contact with the flat surface and fixed. Then, when it is mounted on the in-vehicle display device 1, for example, it is bent due to elastic deformation as shown in FIG.
  • the state in which the first main surface 100A is fixed in contact with the flat surface means that substantially the entire first main surface 100A is in contact with the flat surface only by its own weight, so that the first main surface 100A is the flat surface.
  • the substantially entire area of the first main surface 100A may be a flat surface over the entire area of the first main surface 100A, but is not limited thereto. may refer to the area of In the following description, unless otherwise specified, the glass 100 is fixed with the first main surface 100A in contact with a flat surface. 4 to 9, the direction connecting the first main surface 100A and the second main surface 100B when the first main surface 100A is in contact with the flat surface, that is, the thickness direction of the glass 100 is defined as the Z direction. do.
  • the direction that is perpendicular to the thickness direction (Z direction) of the glass 100 and is also perpendicular to the direction in which the thickness of the glass is constant in a step region described later in the thin region 120 is the first direction.
  • the direction perpendicular to the direction in which the thickness of the glass is constant in the above-mentioned stepped region means that the glass 100 is rectangular as in the example of FIG. When the region 120 is provided, it is parallel to the long side direction of the glass 100 .
  • the first direction may be parallel to the horizontal direction when the glass 100 is mounted on a vehicle. 3 to 17, the first direction is the X direction.
  • a direction orthogonal to the Z direction and the X direction is defined as the Y direction (second direction).
  • the direction from the first main surface 100A to the second main surface 100B is Z1, and the other direction is Z2.
  • one direction (right direction in the example of FIG. 3) is defined as X1
  • the other direction is defined as direction X2.
  • one direction (upward in the example of FIG. 3) is Y1, and the other direction is Y2.
  • the first direction means a direction that is perpendicular to the thickness direction of the glass 100 and is also perpendicular to the direction in which the thickness of the glass is constant in the step region 122 .
  • the first direction may be, for example, a direction that is perpendicular to the thickness direction of the glass 100 and perpendicular to a boundary line between a thin region 120 and a thick region 110, which will be described later.
  • the glass 100 has a rectangular shape when viewed from the direction Z1, and has four side surfaces 100C1, 100C2, 100C3, and 100C4.
  • the side surface 100C1 is the side surface located on the X2 side of the glass 100
  • the side surface 100C2 is the side surface located on the X1 side of the glass 100
  • the side surface 100C3 is the side surface located on the Y1 side of the glass 100
  • a side surface 100C4 is a side surface located on the direction Y2 side of the glass 100 .
  • the shape of the glass 100 is not limited to being rectangular when viewed from the direction Z1, and may be any shape.
  • the glass 100 has thick regions 110 and thin regions 120, which are regions of different thickness.
  • Thin region 120 is a region that is thinner than thick region 110 .
  • the thickness here refers to the length of the thick region 110 and the thin region 120 in the Z direction.
  • the thin region 120 is a recess formed by recessing the second main surface 100B of the glass 100 to form a concave surface. That is, when the main surface of the thick region 110 on the second main surface 100B side is the second main surface 110B, and the concave surface of the thin region 120 on the second main surface 100B side is the second main surface 120B, the thickness Thick region 110 refers to a portion of glass 100 where second main surface 110B is flush with second main surface 100B of glass 100 .
  • the second main surface 120B of the thin region 120 is the first main surface 100A with respect to the second main surface 100B of the glass 100 (that is, the second main surface 110B of the thick region 110). Refers to the part located on the side.
  • the glass 100 has a flat first main surface 100A that is not recessed, that is, has no concave portion. It is also preferable that the glass 100 has no projections on the first main surface 100A and is flat. Further, it is more preferable that the glass 100 has a flat shape with no recesses or protrusions on the first main surface 100A.
  • the first main surface 100A is flat means that the flatness of the entire first main surface 100A is 0.05 mm or less.
  • the first main surface 100A of the glass 100 includes the first main surface 120A that is a region that overlaps with the recessed portion of the thin region 120, and the first main surface 120A that is a region that does not overlap with the recessed portion of the thin region 120.
  • the main surface of the thick region 110 on the first main surface 100A side is the first main surface 110A
  • the main surface of the thin region 120 on the first main surface 100A side is the first main surface 120A.
  • the first main surface 110A and the first main surface 120A are on the same plane.
  • a plurality of thin regions 120 may be formed along the X direction.
  • thick regions 110 are formed between the thin regions 120 adjacent to each other in the X direction.
  • a plurality of thick regions 110 may be formed along the X direction.
  • the thin regions 120 are formed between the thick regions 110 adjacent to each other in the X direction. That is, the glass 100 has thick regions 110 and thin regions 120 alternately formed along the X direction.
  • the number of thin regions 120 is not limited to two.
  • two or more thick regions 110 may be provided, or only one thick region may be provided.
  • the glass 100 is not provided with the thin regions 120 at both ends in the X direction (the portion overlapping with the side surface 100C1 and the portion overlapping with the side surface 100C2 when viewed from the direction Z1), and the both ends in the X direction are thick regions. 110 is preferred.
  • the thin regions 120 preferably extend in the Y direction.
  • the thin region 120 is formed from one end of the glass 100 in the Y direction (the place where it overlaps with the side surface 100C3 when viewed from the direction Z1) to the other end (the place where it overlaps with the side surface 100C4 when viewed from the direction Z1).
  • the glass 100 can be bent around the Y direction so that the second main surface 100B side is convex.
  • the shape of the thin region 120 is not limited to this.
  • the thin region 120 may extend in a direction that is inclined with respect to the Y direction, or may extend in a curved direction rather than in a straight line.
  • the thin region 120 may be provided in a part of the section from one end of the glass 100 to the other end in the Y direction.
  • the thin region 120 may have a constant or variable length in the first direction as long as it satisfies the formula (1) described later.
  • the thick region 110 refers to a region where the flatness is 0.05 mm or less when the flatness is measured with reference to the center position of the second main surface 110B of the thick region 110, that is, the center position is included. , refers to the region of the maximum range where the flatness is 0.05 mm or less.
  • the thick region 110 is defined by the position of each position on the second main surface 110B in the Z direction of the reference point in the Z direction. It can be said that it refers to a region within a range of 0.05 mm or less with respect to the position in .
  • the central position of the second main surface 110B refers to an arbitrary position selected near the center of the second main surface 110B in the X direction, for example, an arbitrary 10 mm square area on the second main surface 110B. , may refer to the central position of the region where the thickness displacement is 0.05 mm or less.
  • the central position of the first major surface 110A may also refer to the same position.
  • the center position of the first main surface 110A of the thick region 110 in the X direction is set as a reference point
  • the position in the Z direction of each position on the first main surface 110A is the reference point. It can be said that the area is within a range of 0.05 mm or less with respect to the position of the point in the Z direction.
  • the thick region 110 is flat and the thickness deviation is small, so that the second main surface of the glass 100 It is possible to disperse the stress in contact with the adhesive layer or the like provided on the 110B side, and to improve the durability during use.
  • the flatness conforms to JIS B 0621: 1984 "Definition and Display of Geometric Deviation", and can be measured by a three-dimensional measuring instrument using a contact probe or laser probe, for example. Also, the position in the Z direction of each position with respect to the reference point can be similarly measured by a three-dimensional measuring device using a contact probe or laser probe.
  • the thickness t s of the thick region 110 is preferably 0.2 to 2.5 mm, more preferably 0.5 to 2.0 mm, even more preferably 0.8 to 1.5 mm.
  • the thickness of the thick region 110 is preferably 0.2 mm or more, more preferably 0.5 mm or more, and even more preferably 0.8 mm or more.
  • the thickness of the thick region 110 is preferably 2.5 mm or less, more preferably 2.0 mm or less, and even more preferably 1.5 mm or less.
  • the thickness of the thick region 110 refers to the length in the Z direction from the first main surface 110A to the second main surface 110B. Regarding the measurement of the thickness, it is preferable to use the average value of the values measured at a plurality of points within the thick region 110 .
  • Thin region 120 is a region of glass 100 that is thinner than thick region 110 . As shown in FIG. 4 , the thin region 120 has a bottom region 121 and a stepped region 122 .
  • the bottom region 121 is a region of the thin region 120 where the second main surface 100B side of the glass 100 is flat.
  • the surface forming the bottom surface region 121 of the first main surface 120A of the thin region 120 is defined as the first main surface 121A
  • the surface forming the bottom surface region 121 of the second main surface 120B of the thin region 120 is defined as It is referred to as a second main surface 121B.
  • the bottom surface region 121 refers to a region having a flatness of 0.07 mm or less when the flatness is measured with reference to the central position of the second main surface 120B of the bottom surface region 121. It refers to the region of the maximum range where the degree is 0.07 mm or less.
  • the bottom region 121 is defined as the position of each position on the second main surface 121B in the Z direction when the center position of the second main surface 120B is set as a reference point. 0.07 mm or less.
  • the center position of the first main surface 120A of the bottom surface region 121 is set as a reference point
  • the position of each position on the first main surface 121A in the Z direction is the position of the reference point in the Z direction.
  • the second main surface 121B of the bottom region 121 can be said to have a flatness of 0.07 mm or less as a whole. , and can be said to be a flat region with a small thickness deviation.
  • the center position of the second main surface 120B refers to the position near the center of the second main surface 120B in the X direction, and for example, the thickness displacement in an arbitrary area of 10 mm square on the second main surface 120B. may refer to the center position of the region where is 0.07 mm or less.
  • the central position of the first major surface 120A may also refer to a similar position.
  • the first main surface 121A and the second main surface 121B of the bottom surface region 121 preferably have an arithmetic mean roughness Ra of JIS B 0601:2001 of 4 nm or less, more preferably 3 nm or less, and 2 nm or less. is more preferable.
  • Arithmetic mean roughness Ra can be measured with an atomic force microscope (AFM).
  • the thickness t w of the bottom surface region 121 is preferably 0.05 mm or more and less than 0.5 mm, more preferably 0.10 to 0.25 mm, even more preferably 0.15 to 0.2 mm.
  • the thickness of bottom region 121 is preferably less than 0.5 mm, more preferably 0.25 mm or less, and even more preferably 0.2 mm or less.
  • the thickness of the bottom surface region 121 is preferably 0.05 mm or more, more preferably 0.10 mm or more, and even more preferably 0.15 mm or more.
  • the thickness of the bottom surface region 121 refers to the length in the Z direction from the first main surface 121A to the second main surface 121B. Regarding the measurement of the thickness, it is preferable to use the average value of the values measured at a plurality of points within the bottom surface region 121 .
  • the step region 122 is a region located between the bottom region 121 and the thick region 110 in the X direction and connecting the bottom region 121 and the thick region 110 .
  • the step region 122 refers to a region where the thickness changes from the thickness of the thick region 110 to the thickness of the bottom region 121, as shown in FIG. Assuming that the surface forming the step region 122 in the first main surface 120A of the thin region 120 is the first main surface 122A, the first main surface 122A is the first main surface of the bottom surface region 121 in the first main surface 120A. It can be said that it is an area other than the surface 121A.
  • the second main surface 122B is the bottom surface region 121 of the second main surface 120B. It can be said that it is a region other than the second main surface 121B.
  • the second main surface 122B is a surface that connects the second main surface 120B of the thin region 120 and the second main surface 110B of the thick region 110, and the flatness thereof is not particularly limited. A detailed shape of the second main surface 122B will be described later.
  • the first main surface 122A is preferably flat, and preferably has a flatness of 0.07 mm or less, more preferably 0.06 mm or less, and 0.05 mm or less. It is even more preferable to have
  • the step regions 122 are formed on both sides of the bottom surface region 121 in the direction X1 and the direction X2.
  • the step region 122 on the X1 side of the bottom region 121 can be said to be a region from the end of the bottom region 121 on the X1 side to the end of the thick region 110 on the X2 side.
  • the step region 122 on the X2 side of the bottom surface region 121 can be said to be a region from the end of the bottom surface region 121 on the X2 side to the end of the thick region 110 on the X1 side.
  • FIG. 5 is a diagram showing an example of an enlarged view in which area C in FIG. 4 is enlarged.
  • the boundary between the thick region 110 and the thin region 120 is defined as a position where the thick region 110 is not flat with respect to the center position (reference point) in the X direction (the position in the Z direction is outside the range defined as the thick region 110).
  • the position closest to the thick region 110 in the X direction which corresponds to the point 122P1 in FIG. That is, the point 122P1 is the end of the stepped region 122 on one side in the X direction (direction X2), and is the boundary between the second main surface 122B of the stepped region 122 and the second main surface 110B of the thick region 110. It can be said that it is a point.
  • the boundary between the bottom region 121 and the stepped region 122 is located at a position where the bottom region 121 is not flat with respect to the center position (reference point) in the X direction of the thin region 120 (the position in the Z direction is the bottom region 121). position closest to the bottom surface region 121 in the X direction outside the defined range), which corresponds to point 122P2 in FIG. That is, the point 122P2 is the end of the stepped region 122 on the other side in the X direction (direction X1 side) and serves as the boundary between the second main surface 122B of the stepped region 122 and the second main surface 121B of the bottom surface region 121. It can be said that it is a point.
  • the stepped region 122 has a straight line shape in a cross section including the thickness direction and the first direction, here a cross section viewed from the Y direction (extending direction of the thin region 120).
  • the step region 122 preferably has an angle ⁇ of 25 to 90 degrees, more preferably 30 to 85 degrees, and even more preferably 35 to 80 degrees.
  • the angle ⁇ is preferably 90° or less, more preferably 85° or less, and even more preferably 80° or less. If the angle ⁇ corresponding to the inclination is within the above range, stress concentration in the step region 122 can be easily suppressed, which is preferable.
  • the angle ⁇ corresponding to the inclination is preferably 25° or more, more preferably 30° or more, and still more preferably 35° or more. It is preferable that the angle ⁇ corresponding to the inclination is within the above range because the area of the bottom surface region 121 with respect to the entire thin region 120 can be increased.
  • the angle ⁇ is defined by a straight line 122L passing through the points 122P1 and 122P2 and an extension line of the second main surface 121B of the bottom surface region 121 in a cross section viewed in the Y direction (extending direction of the thin region 120). is the angle formed by
  • the step region 122 is not limited to being linear, and may be curved (curved) in a cross section viewed in the Y direction, or may include both a linear shape and a curved shape.
  • the shape of the second major surface 122B may have a convex area 122B1 and a concave area 122B2, as shown in FIG.
  • the convex area 122B1 is connected to the thick area 110 and is a curved surface convex with respect to the straight line 122L connecting the points 122P1 and 122P2.
  • the concave surface region 122B2 is connected to the convex surface region 122B1 on the thick region 110 side and connected to the bottom surface region 121 on the bottom surface region 121 side.
  • Being convex with respect to the straight line 122L means, for example, protruding toward the second main surface 110B side from the straight line 122L, that is, being convex
  • being concave with respect to the straight line 122L means, for example, being closer to the first main surface 110A than the straight line 122L. It refers to protruding, that is, being convex. Further, for example, as shown in FIG.
  • the second main surface 122B may be curved concavely with respect to the straight line 122L over the entire area, that is, may be convex toward the first main surface 110A. Further, for example, as shown in FIG. 8, the second main surface 122B may be partly linear and partly curved with respect to the straight line 122L. As shown in FIG. 7 or 8, the curved portion of the second main surface 122B is more preferably concave with respect to the straight line 122L.
  • the radius of curvature is not particularly limited. It can be below.
  • the stepped region 122 preferably has an arc shape when viewed in the Y direction, and the curvature radius of the stepped region 122 in this case refers to the curvature radius of the arc formed by the stepped region 122 .
  • the step region 122 does not have to be arc-shaped when viewed in the Y direction.
  • the curvature radius of the arc that minimizes the deviation may be the curvature radius of the step region 122 .
  • the thin region 120 is usually formed by slimming, grinding, laser processing, or the like. Further processing is required in addition to the first etching for forming. Therefore, the shape shown in FIG. 6 or 7 is preferable. When the shape shown in FIG. 7 is used, the shape shown in FIG. 6 is more preferable because tensile stress is generated at the end point 122P1 after the chemical strengthening treatment described later.
  • the inventors of the present invention determined that the shape of the thin region 120 is appropriate, and preferably, the relationship between the shapes of the thick region 110 and the thin region 120 is set within an appropriate range. By doing so, the inventors recalled that breakage of the glass 100 can be suppressed. A specific description will be given below.
  • the width (length in the X direction) of the thin region 120 is G w (mm)
  • the width of the step region 122 of the thin region 120 is G a (mm).
  • Ga means the width of the step region 122 located in the X1 direction or the X2 direction of the end face region 121 in the thin region 120 .
  • the width Gs is the width of the thick regions 110 between the thin regions 120 in the X direction; That is, the length in the X direction from the boundary position between the thick region 110 and the stepped region 122 adjacent in the X1 direction to the boundary position between the thick region 110 and the stepped region 122 adjacent in the X2 direction It can be said that it refers to When the width G s indicates the width of the thick region 110 at the end in the X direction, the width G s is adjacent to the thick region 110 in the X2 direction from the end of the thick region 110 in the X1 direction.
  • the width Gs is a value indicating the distance between the thin regions 120 in the X direction.
  • the width Gw extends from the boundary position between the thin region 120 and the thick region 110 adjacent in the X1 direction to the boundary position between the thin region 120 and the thick region 110 adjacent in the X2 direction. It can be said that it refers to the length in
  • the width Ga is the distance between the boundary position between the step region 122 and the thick region 110 adjacent in the X1 direction to the boundary position between the step region 122 and the bottom surface region 121 adjacent in the X2 direction.
  • the width G w ⁇ 2G a (the value obtained by subtracting the width G a at both ends from the width G w ) can be said to be a value corresponding to the width of the bottom region 121 .
  • the stepped region 122 on the X1 side and the stepped region 122 on the X2 side forming the thin region 120 have different lengths in the first direction
  • the length is G a1
  • the length of the latter in the first direction is G a2
  • the width G w ⁇ 2G a (the value obtained by subtracting the width G a from the width G w ) is the width G w ⁇ (G a1 +G a2 ) (the value obtained by subtracting the sum of the widths G a1 and G a2 at both ends from the width G w ).
  • the numerator on the left side of equation (1) is also calculated by replacing (G w ⁇ 2G a ) with ⁇ G w ⁇ (G a1 +G a2 ) ⁇ . Note that Ga is 0 when the angle ⁇ is 90°.
  • the thin region 120 preferably satisfies Expression (1) with respect to the width G w ⁇ 2G a of the bottom region 121 and the width G w of the thin region 120 .
  • Equation (1) can be said to represent the lower limit of the width G w ⁇ 2G a of the bottom surface region 121 with respect to the width G w of the thin region 120 .
  • any one thin region 120 may be designed to satisfy formula (1), but it is preferable that all thin regions 120 satisfy formula (1).
  • the width G w ⁇ 2G a of the bottom surface region 121 with respect to the width G w of the thin region 120 (the left side of the formula (1)) is preferably 0.5 or more and 0.9 or less, more preferably 0.6 or more and 0.6 or more. It is more preferably 8 or less.
  • Formula (2) is a mathematical expression (relational expression of the pitch of protrusions and recesses) relating to the ratio between the width Gs of the thick region 110 and the width Gw of the thin region 120. It can also be said that it is an expression showing the lower limit value of the width Gs of the thick region 110 with respect to the total value of the width Gs of . Therefore, if the width G s of the thick region 110 is designed to satisfy the formula (2), the thick region 110 is formed over a sufficient width, so that the strength of the glass 100 is sufficient. .
  • the width G s of the thick region 110 (the left side of the equation (2)) with respect to the total value of the width G w of the thin region 120 and the width G s of the thick region 110 is 0.5 or more and 0.95 or less. It is preferably 0.55 or more and 0.9 or less.
  • the glass 100 satisfies Formula (1), preferably Formulas (1) and (2), a small radius of curvature can be achieved while maintaining strength.
  • Formula (1) and (2) a small radius of curvature can be achieved while maintaining strength.
  • any one of the minimum constituents satisfies the formulas (1) and (2), and all the minimum constituents satisfy the formulas (1) and More preferably, the formula (2) is satisfied.
  • tf be the value represented by Equation (3).
  • t f corresponds to the average thickness (mm) of a minimum structure consisting of one thick region 110 and one thin region 120 adjacent to the thick region 110 .
  • ts is the thickness (mm) of the thick region 110
  • tw is the thickness (mm) of the bottom region 121 .
  • G w and G s are the same as in formula (2).
  • ⁇ CS indicates the compressive stress value (MPa) acting on the main surface of the glass 100 due to chemical strengthening, and can be said to be the surface compressive stress (CS) in the compressive stress layer described later.
  • E refers to the Young's modulus (GPa) of the glass 100, which will be described later.
  • R indicates the curvature radius (mm) in the thin region of the glass 100 in a bent state due to elastic deformation. Point. Therefore, the formula (4) can be said to be a formula showing the upper limit of the average thickness tf of the minimum structure capable of bending the glass 100 to the radius of curvature R. It can be said that this is an expression showing the upper limit of the width Gs .
  • the width Gw of thin region 120, the width Gs of thick region 110, the thickness ts of thick region 110, and the thickness tw of bottom region 121 are determined by the formula By designing to satisfy (4), it becomes sufficiently bendable.
  • the radius of curvature R connects the endpoint on one side and the endpoint on the other side of the curved region on the principal surface of the glass 100, and is the principal radius of the glass 100 from the endpoint on the one side to the endpoint on the other side. It may be the radius of curvature of the arc that minimizes the deviation from the profile passing through the surface.
  • the curvature radius R is, for example, 10 to 10000 mm, preferably 10 to 200 mm, more preferably 20 to 100 mm, even more preferably 20 to 50 mm.
  • the curvature radius R is, for example, 10000 mm or less, preferably 200 mm or less, more preferably 100 mm or less, and even more preferably 50 mm or less.
  • the curvature radius R is preferably 10 mm or more, more preferably 20 mm or more. Preferred numerical ranges for E and ⁇ CS will be described later.
  • FIG. 9 is a diagram showing another example of a schematic top view of the glass according to this embodiment in a state of being fixed in contact with a flat surface. For example, as shown in FIG.
  • the width of the thin region 120 may be formed large at both ends in the Y direction. That is, of the thin regions 120, the central region 120D is the region located in the center in the Y direction, and the end regions 120C are the regions located on the Y1 side and the Y2 side of the central region 120D. The end region 120C is located at a position overlapping the end of the glass 100 on the Y1 side and the end on the Y2 side when viewed from the Z direction. In this case, the width (length in the X direction) of the thin region 120 is constant in the central region 120D. Note that the term "constant" here includes a range that is not exactly the same, and for example, a deviation of 5% from the average width of the central region 120D is allowed.
  • the width of the thin region 120 increases with increasing distance from the central region 120D.
  • the ratio of the length of the central region 120D in the Y direction to the length of the entire thin region 120 in the Y direction is preferably 1% or more and 15% or less, more preferably 2% or more and 13% or less. More preferably, it is 3% or more and 11% or less. Note that when the central region 120D and the end regions 120C exist as described above, the values of the central region 120D are used for various parameters such as the widths G w , G a , and GS in the formulas (1) to (4). you can
  • the Young's modulus (E cg ) of the glass 100 is preferably 60-95 GPa, more preferably 70-90 GPa.
  • the Young's modulus (E cg ) is preferably 60 GPa or more, more preferably 70 GPa or more.
  • the Young's modulus (E cg ) of the glass 100 is preferably 95 GPa or less, more preferably 90 GPa or less.
  • the Young's modulus of each member including the glass 100 may be determined by a tensile test (JIS K7161 (2014), JIS K7113 (1995)).
  • the glass 100 is preferably tempered glass such as chemically tempered glass.
  • the thickness (DOL) of the compressive stress layer of the cover member is preferably 5-180 ⁇ m, more preferably 10-180 ⁇ m, even more preferably 15-50 ⁇ m.
  • the thickness (DOL) of the compressive stress layer is, for example, preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, and even more preferably 15 ⁇ m or more.
  • the thickness (DOL) of the compressive stress layer is preferably, for example, 180 ⁇ m or less, more preferably 50 ⁇ m or less.
  • the surface compressive stress (CS) of the compressive stress layer is preferably 500 MPa or higher, more preferably 650 MPa or higher, and even more preferably 750 MPa or higher.
  • the upper limit is not particularly limited, for example, CS is preferably 1200 MPa or less.
  • the material of the glass 100 is arbitrary, for example, soda lime glass, aluminosilicate glass (SiO 2 —Al 2 O 3 —Na 2 O based glass or SiO 2 —Al 2 O 3 —Li 2 O—Na 2 O based glass) is used. glass) and the like. Among them, aluminosilicate glass is preferable from the viewpoint of strength.
  • Materials of the glass 100 include, for example, 50% to 80% of SiO 2 , 1% to 20% of Al 2 O 3 , and 6% to 20% of Na 2 O in terms of mol % based on oxides.
  • K 2 O 0% to 10%, MgO 0% to 15%, CaO 0% to 5%, P 2 O 5 0% to 5%, B 2 O 3 0% or more
  • a glass material containing 5% or less, 0% or more and 5% or less of Y 2 O 3 , and 0% or more and 5% or less of ZrO 2 can be mentioned.
  • material of the glass 100 chemically strengthened glass based on aluminosilicate glass (for example, "Dragontrail (registered trademark)" manufactured by AGC) is also preferably used.
  • the space above the thin region 120 in other words, the space surrounded by the second main surface 121B of the bottom surface region 121 and the second main surfaces 122B of the stepped regions 122 at both ends is filled with Agent 200 is filled. If the refractive index of the filler 200 is not properly controlled, light from the display panel or the like is reflected by the step region 122, and the reflected light is recognized, thereby making the step region 122 visible. In order to suppress this reflected light, attention was paid to the standard relative luminosity (standard relative luminosity of photopic vision and scotopic vision) defined by the International Commission on Illumination (CIE).
  • CIE International Commission on Illumination
  • the absolute value of the difference in refractive index from the glass 100 at a wavelength of 555 nm is 0.015 or less, and furthermore, 0. 0.013 or less is preferable, 0.011 or less is more preferable, 0.009 or less is still more preferable, and 0.008 or less is particularly preferable.
  • the absolute value of the refractive index difference of the filler 200 with respect to the glass 100 at a wavelength of 507 nm is 0.015 or less, preferably 0.013 or less, more preferably 0.011 or less, and 0.011 or less. is more preferable, and 0.008 or less is particularly preferable. More preferably, the filler 200 has a refractive index difference with the glass 100 at a wavelength of 555 nm and a refractive index difference with the glass 100 at a wavelength of 507 nm both within the above ranges.
  • the filler 200 is, for example, a cured product of an adhesive (transparent adhesive) such as a thermosetting adhesive or an ultraviolet curable adhesive.
  • Liquids such as, but not limited to, water, oils, organic solvents, liquid polymers, ionic liquids, and mixtures thereof may be used. More specifically, propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, etc.), modified silicone oil, acrylic acid-based polymer, liquid polybutadiene, Glycerin paste, fluorinated solvents, fluorinated resins, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof.
  • straight silicone oil dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, etc.
  • modified silicone oil acrylic acid-based polymer
  • liquid polybutadiene liquid polybutadiene
  • Glycerin paste fluorinated solvents, fluorinated resins, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof.
  • the glass 100 according to the present embodiment can be manufactured by some manufacturing methods, for example, by slimming sheet glass.
  • slimming includes masking and etching.
  • the manufacturing method of the glass 100 according to the present embodiment is not limited to this, and the glass 100 can also be manufactured by grinding or laser processing a sheet glass.
  • the glass 100 may be manufactured by combining the above methods. For example, after forming the thin region 120 and the thick region 110 by grinding, etching may be performed to form the shape of the second main surface 122B of the step region 122 and to smooth the surface.
  • etching may be performed to form the shape of the second main surface 122B of the step region 122 and to smooth the surface.
  • a method of processing by slimming is shown below.
  • the surface of the second main surface 100B of the glass 100 that becomes the second main surface 110B of the thick region 110 and the entire first main surface 100A are covered with a mask material.
  • the material of the mask material is not particularly limited as long as it is a material having resistance to the etchant described later, and conventionally known materials can be appropriately selected and used.
  • a resist pattern may be formed on the second main surface 100B of the glass 100 as a mask material.
  • a known resist paint is coated on the second main surface 100B of the glass 100 to obtain a resist film.
  • the obtained resist film is exposed through a photomask having a pattern having a desired shape.
  • the exposed resist film is developed to form a resist pattern.
  • the glass 100 covered with the mask material is etched using an etchant.
  • a portion of the glass 100 that is not covered with the mask material is dissolved by the etchant. Dissolution progresses gradually from the second main surface 100B, which is not covered with the mask material, toward the first main surface 100A. In this way, the portion that will become the thin region 120 is formed.
  • a smooth etching surface (curved surface) is formed, and a portion that becomes the step region 122 is formed.
  • the method of processing by grinding is shown below.
  • the second main surface 100B is ground. Grinding is performed using a surface grinding device such as a milling machine.
  • the type of grindstone of the surface grinder used for grinding is not particularly limited, and for example, a diamond grindstone can be used.
  • a coolant may be supplied to suppress local temperature rise of the processed portion.
  • the method of processing by laser processing is shown below.
  • the second main surface 100B is laser-processed. For example, processing is performed by condensing laser pulses so as to focus on the second main surface 100B of the glass 100 .
  • the processed glass 100 is preferably subjected to chemical strengthening treatment.
  • a chemical strengthening process is performed by a well-known method.
  • molten salts used for chemical strengthening include alkali nitrates such as potassium nitrate, sodium nitrate, potassium sulfate and sodium sulfate, alkali sulfates and alkali chloride salts. These molten salts are not limited to being used alone, and may be used in combination of multiple types, and may be mixed with other salts in order to adjust the chemical strengthening properties.
  • the glass 100 can be strengthened.
  • the treatment conditions such as the temperature of the molten salt and the immersion time may be set so that the compressive stress value (CS) of the compressive stress layer, the thickness (DOL) of the compressive stress layer, and the like become desired values.
  • the chemically strengthened glass 100 may be further subjected to acid treatment and alkali treatment.
  • the acid treatment is a treatment in which the chemically strengthened glass 100 is immersed in an acid solution.
  • Na and/or K on the surface of the chemically strengthened glass 100 are replaced with H. That is, the surface layer of the compressive stress layer in the glass 100 subjected to the chemical strengthening treatment is changed in quality and becomes a low-density layer having a low density.
  • Alkaline treatment is a treatment in which the acid-treated glass 100 is immersed in a basic solution. This removes part or all of the low-density layer formed by the acid treatment. In this way, cracks and latent flaws existing on the surface of the glass 100 can be removed together with the low density layer.
  • the glass 100 according to the present embodiment is glass having the first main surface 100A and the second main surface 100B opposite to the first main surface 100A, and the thick region 110, and a thin region 120 adjacent to the thick region 110 and thinner than the thick region 110 with the second main surface 100B having a concave surface. and a stepped region 122 provided between the bottom region 121 and the thick region 110, and the thin region 120 satisfies formula (1). .
  • the thin region 120 since the thin region 120 satisfies the formula (1), stress concentration at the center of the thin region 120 can be suppressed, so breakage when the glass 100 is bent can be suppressed. bendable enough.
  • the thick region 110 preferably includes a region that is flat when the first main surface 100A is fixed so as to be in contact with the flat surface.
  • concentration of stress can be suppressed when the glass 100 is attached to a display or the like, breakage of the glass 100 can be suppressed, and the glass 100 can be bent sufficiently.
  • One end point of the step region 122 in a cross section including the thickness direction and the first direction of the glass 100 (here, a cross section viewed from the Y direction) with the first main surface 100A fixed so as to be in contact with a flat surface.
  • an angle ⁇ formed by a straight line 122L including 122P1 and the other end point 122P2 and an extension line of the bottom surface region 121 is 25° or more and 90° or less.
  • the second principal surface 122B of the stepped region 122 includes a curved region in the cross section, and the curved line is convex toward the first principal surface 100A with respect to the straight line 122L.
  • the second main surface 122B of the stepped region 122 has this shape, thereby suppressing concentration of stress in the center of the thin region 120, thereby suppressing breakage of the glass 100. bendable enough.
  • Two or more thin regions 120 are formed in the glass 100 in the first direction (X direction), and thick regions 110 are formed between the thin regions 120, and the thin regions and the thick regions formed therebetween are formed.
  • the region preferably satisfies formula (2).
  • the glass 100 according to the present embodiment can suppress breakage and can be bent sufficiently by satisfying Expression (2) with respect to the pitch of the unevenness between the thick regions 110 and the thin regions 120 .
  • the glass 100 is chemically strengthened glass, and two or more thin regions 120 are formed in the first direction (X direction). is represented by the following formula (3), at least one of the thin regions preferably satisfies the formula (4).
  • the glass 100 according to the present embodiment can be bent sufficiently by satisfying Expression (4) with respect to the pitch of the unevenness between the thick regions 110 and the thin regions 120 .
  • the curvature radius R of the curved surface (curved portion) formed by at least one of the thin regions 120 is preferably 10 mm or more and 10000 mm or less. By setting the curvature radius R within this range, breakage of the glass 100 can be suppressed and the glass can be bent sufficiently.
  • the thickness ts of the thick region 110 is preferably 0.2 mm or more and 2.5 mm or less. By setting the thickness t s of the thick region 110 within this range, breakage of the glass 100 can be suppressed and the glass can be bent sufficiently.
  • the thickness tw of the bottom surface region 121 is preferably 0.05 mm or more and 0.5 mm or less. By setting the thickness tw of the bottom surface region 121 within this range, the glass 100 can be sufficiently bent.
  • the glass 100 according to the present embodiment is preferably bendable around the second direction (Y direction) perpendicular to the thickness direction of the glass 100 and the first direction. Thereby, the glass 100 is sufficiently bent in the X direction.
  • the thin region 120 preferably extends in a direction (eg, Y direction) perpendicular to the thickness direction (Z direction) of the glass 100 .
  • a direction eg, Y direction
  • Z direction thickness direction
  • Y direction second direction perpendicular to the first direction (X direction)
  • the glass structure 10 according to this embodiment has the glass 100 according to this embodiment and the filler 200 filled on the thin region 120 of the glass 100 .
  • the absolute value of the refractive index difference between the filler 200 and the glass 100 at a wavelength of 555 nm is 0.008 or less
  • the absolute value of the refractive index difference between the filler 200 and the glass 100 at a wavelength of 507 nm is 0.008. 008 or less.
  • the in-vehicle display device 1 has displays 22 to 25 and a glass structure 10 .
  • the glass structure 10 can be sufficiently bent.
  • the in-vehicle display device 1 is preferably bonded to the displays 22 to 25 with the thin regions 120 being elastically deformed. Thereby, in the in-vehicle display device 1, the glass structure 10 can be sufficiently bent.
  • the in-vehicle display device 1 is wound with the glass structure 10 . Thereby, in the in-vehicle display device 1, the glass structure 10 can be sufficiently bent.
  • the thick region 110 of the glass 100 of the glass structure 10 is bonded to the frame, and the thin region 120 is held in a movable state. Thereby, in the in-vehicle display device 1, the glass structure 10 can be sufficiently bent.
  • a glass having a first principal surface and a second principal surface opposite to the first principal surface The glass has a thick region and a thin region adjacent to the thick region and thinner than the thick region, the second main surface being a concave surface, The thin region includes a bottom region where the second principal surface is flat when the first principal surface is fixed so as to be in contact with the flat surface, and a step formed between the bottom region and the thick region. area and The thin region is glass that satisfies the following formula (1).
  • Gw is the length (mm) of the thin region in the first direction
  • Ga indicates the length (mm) of the step region in the first direction.
  • the step region includes a region that is curved in a cross section including the thickness direction and the first direction in a state where the first principal surface is fixed so as to be in contact with a flat surface, and the curve is the The glass according to [3] above, which is convex toward the first main surface with respect to a straight line.
  • Two or more thin regions are formed in the first direction in a cross section including the thickness direction and the first direction in a state in which the first main surface is fixed so as to be in contact with a flat surface, The thick regions are formed between the thin regions,
  • Gw is the length (mm) of the thin regions in the first direction
  • Gs is the length of the thick regions between the thin regions in the first direction. (mm).
  • the glass is chemically strengthened glass, Two or more thin regions are formed in the first direction, In a state in which the thin regions form a curved surface with a radius of curvature R (mm) due to elastic deformation, when tf is represented by the following formula (3), at least one of the thin regions is represented by formula (4).
  • tw is the thickness (mm) of the bottom region
  • Gw is the length (mm) of the thin region in the first direction
  • ts is the thickness (mm) of the thick regions
  • Gs is the length (mm) of the thick regions between the thin regions in the first direction
  • E is the glass is the Young's modulus (GPa) of
  • ⁇ cs refers to the compressive pressure (MPa) due to chemical strengthening of the glass.
  • a glass structure comprising the glass according to any one of [1] to [11] and a filler filled on the thin region of the glass.
  • the refractive index difference between the filler and the glass at a wavelength of 555 nm is 0.008 or less in absolute value
  • the glass structure according to [12] wherein the refractive index difference between the filler and the glass at a wavelength of 507 nm is 0.008 or less in absolute value.
  • An in-vehicle display device comprising a display and the glass structure according to [12] or [13].
  • Table 1 is a table showing properties of the glasses of Examples 1 to 8.
  • Examples 1 and 5 are comparative examples, and examples 2 to 4 and 6 to 9 are examples.
  • a simulation model of the glass 100 was prepared under the following conditions.
  • the compressive stress value (CS) of the compressive stress layer of the glass structure 10 is assumed to be 950 MPa.
  • the depth (DOL) of the compressive stress layer is assumed to be 20 ⁇ m.
  • G a , G w , G s and the shape of the second main surface 122B of the stepped region 122 are input to generate a model of the glass 100, and the approximate bending radius (mm) and the filling The partial cross-sectional area ratio and the 4PB strength ratio per kg were calculated.
  • the approximate limit bending radius is the radius of curvature R of the bent portion of the glass 100 when the maximum stress generated when the glass 100 is bent reaches a predetermined limit stress, and is the lower limit value that the curvature radius R can take. (maximum amount of bending within a range that does not break). That is, the smaller the value of the limit bending approximate radius, the better the bending.
  • the filler cross-sectional area ratio is the ratio of the cross-sectional area of the filler 200 to the cross-sectional area of the minimum structural unit, that is, the cross-sectional area of the region including one thin region 120 and one thick region 110. Specifically, refers to the ratio of the cross-sectional area of the filler 200 filled in the filler 200 to the cross-sectional area of the minimum structural unit.
  • the amount of the filler 200 whose refractive index is adjusted can generally be reduced.
  • the stress load applied to the filler 200 which is inferior in durability, can be suppressed. Therefore, it is considered that the smaller the filling portion cross-sectional area ratio, the better.
  • the 4PB intensity ratio is a dimensionless number represented by ⁇ a/ ⁇ b.
  • ⁇ a (mm) is the thin region 120 connecting the midpoints of the side surface 100C1 located on the direction X2 side of the glass 100 and the side surface 100C2 located on the direction X1 side of the glass 100 in the glass 100.
  • the length in the Y direction is 30 mm
  • the thickness of the thick region 110 is 1.1 mm
  • the amount of deflection when a similar load is applied to glass without the thin region 120 . That is, the 4PB strength ratio can be said to be the ratio of the amount of deflection of the glass 100 to the case where it is assumed that the thin region 120 is not provided. can be suppressed, it is considered that the strength is excellent.
  • Example 10 is a diagram showing a cross section of the cover glass of Example 1.
  • FIG. 10 shows a repeated minimum structure for the cover glass, and the same applies to subsequent examples. Therefore, the length of the thick regions in the first direction between the thin regions represented by G s is twice the length in the first direction of one of the thick regions adjacent to the thin regions in the figure. .
  • the entire thin region 120 has an arched shape formed by curved surfaces. )
  • the value of (G w ⁇ 2G a )/G w which is the left side of More specifically, the minimum structure of glass 100 in Example 1 is 30 mm long in the X direction and 1.1 mm thick.
  • the curved surface is symmetrical and concave about the center of , and the thickness of the center (thickness at the thinnest point) in the X direction is 0.20 mm.
  • Example 1 the value of G s /(G w +G s ), which is the left side of Equation (2), is the value shown in Table 1. It can be seen that Example 1, which is a comparative example, does not satisfy the formula (1) and cannot be sufficiently bent.
  • Example 2 is a diagram showing a cross section of the cover glass of Example 2.
  • the thin region 120 has a second main surface 122B of the stepped region 122 with a slope, and the bottom region 121 is provided.
  • the minimum structure of glass 100 in Example 2 is 30 mm long in the X direction and 1.1 mm thick.
  • a step region 122 is provided.
  • a bottom area 121 spans 18.20 mm and is 0.20 mm thick.
  • the values of (G w ⁇ 2G a )/G w and G s /(G w +G s ) are the values shown in Table 1. As shown in Table 1, Example 2, which is an embodiment, satisfies the formula (1) and is easy to bend.
  • Example 3 12 is a diagram showing a cross section of the cover glass of Example 3.
  • FIG. 12 in Example 3, the thin region 120 has the second main surface 122B of the stepped region 122 formed into a curved surface that protrudes toward the first main surface 100A, and the bottom region 121 is provided.
  • the minimum structure of glass 100 in Example 3 is 30 mm long in the X direction and 1.1 mm thick.
  • a step region 122 is provided.
  • a bottom area 121 spans 18.20 mm and is 0.20 mm thick.
  • the values of (G w ⁇ 2G a )/G w and G s /(G w +G s ) are the values shown in Table 1. As shown in Table 1, Example 3, which is an embodiment, satisfies the formula (1), so that it is easy to bend. I understand.
  • Example 4 is a diagram showing a cross section of the cover glass of Example 4.
  • FIG. 13 also in Example 4, in the thin region 120, the shape of the second main surface 122B of the step region 122 is a curved surface that protrudes toward the first main surface 100A, and the bottom surface region 121 is provided.
  • the minimum structure of the glass 100 in Example 4 is 30 mm long in the X direction and 1.1 mm thick.
  • a step region 122 is provided.
  • the bottom area 121 spans 13.20 mm and has a thickness of 0.20 mm.
  • the values of (G w ⁇ 2G a )/G w and G s /(G w +G s ) are the values shown in Table 1.
  • Example 4 which is an embodiment, is easy to bend because it satisfies formula (1), and has a curved surface in the step region 122, making it easier to bend. has been improved.
  • Example 5 14 is a diagram showing a cross section of the cover glass of Example 5.
  • FIG. 14 the shape of the second main surface 122B of the step region 122 is a slope, and the bottom region 121 is provided. More specifically, the minimum structure of glass 100 in Example 5 is 30 mm long in the X direction and 1.1 mm thick.
  • a step region 122 is provided.
  • a bottom area 121 extends over 3.60 mm and has a thickness of 0.20 mm.
  • Example 5 which is a comparative example, the values of (G w ⁇ 2G a )/G w and G s /(G w +G s ) are the values shown in Table 1. As shown in Table 1, in Example 5, which is a comparative example, the expression (1) is not satisfied, so it can be seen that it cannot be bent sufficiently.
  • Example 6 is a diagram showing a cross section of the cover glass of Example 6.
  • FIG. 15 is a diagram showing a cross section of the cover glass of Example 6.
  • Example 6 as in Example 5, the shape of the second main surface 122B of the step region 122 is inclined, and the bottom surface region 121 is provided. More specifically, the minimum structure of the glass 100 in Example 6 is 30 mm long in the X direction and 1.1 mm thick.
  • a step region 122 is provided.
  • a bottom area 121 extends over 6 mm and has a thickness of 0.20 mm.
  • Example 6 which is an embodiment, the values of (G w ⁇ 2G a )/G w and G s /(G w +G s ) are the values shown in Table 1.
  • Example 6 which is an embodiment, satisfies the formula (1), so that it is easy to bend, and further satisfies the formula (2), so that the strength is improved.
  • Example 7) 16 is a diagram showing a cross section of the cover glass of Example 7.
  • FIG. 16 in Example 7, as in Example 5, the shape of the second main surface 122B of the step region 122 is a slope, and the bottom surface region 121 is provided. More specifically, the minimum structure of the glass 100 in Example 7 is 30 mm long in the X direction and 1.1 mm thick.
  • a step region 122 is provided.
  • a bottom area 121 extends over 10.56 mm and has a thickness of 0.20 mm.
  • the values of (G w ⁇ 2G a )/G w and G s /(G w +G s ) are the values shown in Table 1.
  • Example 8 17 is a diagram showing a cross section of the cover glass of Example 8.
  • the shape of the thin region 120 is the same as in Examples 3 and 4. It has a curved surface convex to the side, and a bottom area 121 is provided. More specifically, the minimum structure of the glass 100 in Example 8 is 30 mm long in the X direction and 1.1 mm thick.
  • a step region 122 is provided.
  • the bottom area 121 spans 10.56 mm and has a thickness of 0.20 mm.
  • the value of (G w ⁇ 2G a )/G w and the value of G s /(G w +G s ) are the values shown in Table 1. As shown in Table 1, Example 8, which is an embodiment, satisfies the formula (1), so that it is easy to bend, and further satisfies the formula (2), so that the strength is improved. Since the surface 122B is a curved surface, it is easier to bend, and it can be understood that it can be bent sufficiently.
  • Example 9 is a diagram showing a cross section of the cover glass of Example 9.
  • the shape of the thin region 120 is such that the shape of the second main surface 122B of the stepped region 122 is a slanted shape, and the bottom region 121 is provided, as in Example 5.
  • the minimum structure of glass 100 in Example 9 is 30 mm long in the X direction and 0.70 mm thick.
  • the thin region 120 has a bottom region 121 and a step.
  • a region 122 is provided.
  • the bottom area 121 spans 11.20 mm and has a thickness of 0.20 mm.
  • the angle ⁇ corresponding to the inclination is 51°.
  • the values of (G w ⁇ 2G a )/G w and G s /(G w +G s ) are the values shown in Table 1. As shown in Table 1, Example 9, which is an embodiment, satisfies the formula (1), so it is easy to bend, and further satisfies the formula (2), so the strength is improved. Since the surface 122B is a curved surface, it is easier to bend, and it can be understood that it can be bent sufficiently.

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PCT/JP2022/047245 2021-12-27 2022-12-21 ガラス、ガラス構造体及び車載用表示装置 Ceased WO2023127669A1 (ja)

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CN202280086155.4A CN118475543A (zh) 2021-12-27 2022-12-21 玻璃、玻璃结构体和车载用显示装置
EP22915892.8A EP4458783A4 (en) 2021-12-27 2022-12-21 GLASS, GLASS STRUCTURE AND EMBEDDED DISPLAY DEVICE
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JP2004079467A (ja) * 2002-08-22 2004-03-11 Nippon Sheet Glass Co Ltd Ｅｌ素子用封止板、及び該封止板多面取り用マザーガラス基板
WO2019049958A1 (ja) * 2017-09-11 2019-03-14 Ａｇｃ株式会社 カバー部材および携帯情報端末
WO2021006043A1 (ja) * 2019-07-10 2021-01-14 Ａｇｃ株式会社 ガラス基体、カバーガラス、組立体、組立体の製造方法、車載表示装置、および、車載表示装置の製造方法
US20210107829A1 (en) 2019-10-14 2021-04-15 Corning Incorporated Methods of making a foldable apparatus
JP2021520044A (ja) * 2018-02-12 2021-08-12 コーニング インコーポレイテッド 細長微細構造および光抽出機構を備えるガラス物品
WO2021246499A1 (ja) * 2020-06-04 2021-12-09 日本板硝子株式会社 表示装置
WO2021256089A1 (ja) * 2020-06-19 2021-12-23 Ａｇｃ株式会社 ガラス構造体およびカバーガラス

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JP2004079467A (ja) * 2002-08-22 2004-03-11 Nippon Sheet Glass Co Ltd Ｅｌ素子用封止板、及び該封止板多面取り用マザーガラス基板
WO2019049958A1 (ja) * 2017-09-11 2019-03-14 Ａｇｃ株式会社 カバー部材および携帯情報端末
JP2021520044A (ja) * 2018-02-12 2021-08-12 コーニング インコーポレイテッド 細長微細構造および光抽出機構を備えるガラス物品
WO2021006043A1 (ja) * 2019-07-10 2021-01-14 Ａｇｃ株式会社 ガラス基体、カバーガラス、組立体、組立体の製造方法、車載表示装置、および、車載表示装置の製造方法
US20210107829A1 (en) 2019-10-14 2021-04-15 Corning Incorporated Methods of making a foldable apparatus
WO2021246499A1 (ja) * 2020-06-04 2021-12-09 日本板硝子株式会社 表示装置
WO2021256089A1 (ja) * 2020-06-19 2021-12-23 Ａｇｃ株式会社 ガラス構造体およびカバーガラス

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See also references of EP4458783A4

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TW202335886A (zh) 2023-09-16
EP4458783A4 (en) 2025-12-31

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