WO2017043538A1 - ディスプレイ用カバー部材及びその製造方法 - Google Patents
ディスプレイ用カバー部材及びその製造方法 Download PDFInfo
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- WO2017043538A1 WO2017043538A1 PCT/JP2016/076327 JP2016076327W WO2017043538A1 WO 2017043538 A1 WO2017043538 A1 WO 2017043538A1 JP 2016076327 W JP2016076327 W JP 2016076327W WO 2017043538 A1 WO2017043538 A1 WO 2017043538A1
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- cover member
- uneven surface
- display cover
- display
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Images
Classifications
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- 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
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
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- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
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- 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
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
- C03C17/002—General methods for coating; Devices therefor for flat glass, e.g. float glass
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- 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
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- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
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- G02B1/113—Anti-reflection coatings using inorganic layer materials only
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- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
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- 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
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- G02F1/1333—Constructional arrangements; Manufacturing methods
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- 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
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
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- C03C2217/213—SiO2
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- 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
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/73—Anti-reflective coatings with specific characteristics
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- 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
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/77—Coatings having a rough surface
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- 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
- C03C2217/00—Coatings on glass
- C03C2217/90—Other aspects of coatings
- C03C2217/94—Transparent conductive oxide layers [TCO] being part of a multilayer coating
- C03C2217/948—Layers comprising indium tin oxide [ITO]
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- 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
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
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- 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
- C03C23/007—Other surface treatment of glass not in the form of fibres or filaments by thermal treatment
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- 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
- G02F1/13338—Input devices, e.g. touch panels
Definitions
- the present invention relates to a display cover member with little background reflection and excellent antiglare property, and a method for manufacturing the same.
- the surface roughness of the antiglare layer so that the haze of the cover member is increased.
- the pixels of the display and the surface unevenness of the cover member interfere with each other, so that a so-called “sparkling” that is difficult to see due to a luminance distribution occurs. There is a problem. Therefore, it is desired to prevent the occurrence of glare while suppressing regular reflection and suppressing reflection of the background.
- the main object of the present invention is to provide a display cover member that can realize a display with less background reflection and excellent glare prevention.
- one main surface is constituted by an uneven surface, and the average length (RSm) of the roughness curve element defined by JIS B0601-2013 of the uneven surface is 1 ⁇ m or more and 30 ⁇ m or less, and the ratio of the average inclination angle ( ⁇ ) of the roughness curve of the uneven surface to the kurtosis (Rku) of the roughness curve defined by JIS B0601-2013 of the uneven surface, ⁇ / Rku is 0 .40 ° or more and 1.08 ° or less.
- one main surface is constituted by an uneven surface
- the average length (RSm) of the roughness curve element defined by JIS B0601-2013 of the uneven surface is 1 ⁇ m or more and 30 ⁇ m or less
- the average inclination angle ( ⁇ ) of the roughness curve of the uneven surface is 1.2 ° or more and 7.0 ° or less
- the roughness curve defined by JIS B0601-2013 of the uneven surface The kurtosis (Rku) is 2.2 or more and 10 or less.
- the first or second display cover member according to the present invention preferably has a haze of 1% to 50%.
- the first or second display cover member according to the present invention preferably has an arithmetic average roughness (Ra) defined by JIS B0601-2013 of the uneven surface of 0.04 ⁇ m or more and 0.25 ⁇ m or less.
- may be 2 or less. preferable.
- the first or second display cover member according to the present invention includes a translucent plate and a coating film that covers at least a part of one main surface of the translucent plate and forms the uneven surface. It is preferable to provide.
- the coating film covers the entire one main surface of the translucent plate.
- the coating film is preferably made of an inorganic film.
- the coating film has a pencil hardness defined by JIS K5600-5-4-1999 of 6H or more.
- the translucent plate is formed of a glass plate.
- the glass plate is preferably formed of a tempered glass plate.
- a method for manufacturing a display cover member according to the present invention is a method for manufacturing the first or second display cover member, wherein the uneven surface is formed on a translucent plate by a spray method. A coating film is formed.
- the light transmitting plate is made of a glass plate and the glass plate is chemically strengthened after the coating film is formed.
- a tempered glass plate as the translucent plate.
- the present invention it is possible to provide a display cover member that can realize a display with less background reflection and excellent glare prevention.
- FIG. 1 is a schematic cross-sectional view of a display cover member 1 according to an embodiment of the present invention.
- the display cover member 1 is a member used by being disposed on the front surface of the display. Specifically, the display cover member 1 is provided and used on a display so that the first main surface 1a faces the outside (viewer side) and the second main surface 1b faces the inside.
- the display cover member 1 may be, for example, a member constituting a front plate of the display or a member provided on the front plate.
- the first main surface 1 a of the display cover member 1 is constituted by an uneven surface 2.
- the display cover member 1 includes a translucent plate 10 and a coating film 11.
- the cover member 1 for a display may be comprised by one transparent member which has an uneven surface.
- the average length (RSm) of the roughness curve element defined by JIS B0601-2013 of the uneven surface 2 is 1 ⁇ m or more and 30 ⁇ m or less. If RSm is within the above range and is sufficiently smaller than the pixel size of the display (about 60 to 100 ⁇ m), a display excellent in glare prevention can be realized.
- RSm is preferably 3 ⁇ m or more, more preferably 5 ⁇ m or more, still more preferably 8 ⁇ m or more, and particularly preferably 10 ⁇ m or more. If RSm is too small, the width of the convex and concave portions becomes small, and the durability (scratch resistance) of the surface may decrease.
- RSm is preferably 25 ⁇ m or less, more preferably 22 ⁇ m or less, further preferably 20 ⁇ m or less, and particularly preferably 18 ⁇ m or less. If RSm is too large, display glare is likely to occur.
- the average inclination angle ( ⁇ ) of the roughness curve of the uneven surface 2 is an index indicating the average inclination of the uneven surface 2. As ⁇ is smaller, background reflection tends to occur more easily.
- the average inclination angle ( ⁇ ) can be measured as follows.
- the height of the surface of the uneven surface 2 is measured along the one direction by scanning the surface of the uneven surface 2 with a laser or a stylus along the one direction.
- the length (measurement length) along one direction in which the height measurement is performed can be set to, for example, about 200 ⁇ m to 350 ⁇ m.
- the height can be measured at intervals of 0.5 ⁇ m, for example.
- the center line L is determined. Specifically, the center line L that passes through the average height of the roughness curve of the uneven surface is determined.
- the absolute value of the angle between the irregular surface 2 and the center line L is measured every 0.5 ⁇ m interval.
- the average inclination angle ( ⁇ ) is calculated by averaging the absolute values of the angles formed by the concavo-convex surface 2 and the center line L every 0.5 ⁇ m interval measured every 0.5 ⁇ m interval. be able to.
- the average inclination angle ( ⁇ ) of the roughness curve of the concavo-convex surface 2 is preferably 1.2 ° or more, more preferably 1.5 ° or more, and 1.8 It is more preferably at least 0 °, particularly preferably at least 2 °. If ⁇ is too small, background reflection tends to occur. On the other hand, ⁇ is preferably 7 ° or less, more preferably 5 ° or less, further preferably 4 ° or less, and particularly preferably 3 ° or less. If ⁇ is too large, the display resolution tends to decrease.
- the roughness curve kurtosis (Rku) defined by JIS B0601-2013 on the uneven surface 2 is an index indicating the sharpness of the tip of the uneven portion.
- the larger the Rku the more the tip of the concavo-convex part is pointed, so the inclination angle near the concavo-convex tip part becomes large, but the inclination angle of the other part becomes small and the reflection of the background tends to occur.
- the smaller the Rku the more the concave and convex portions have a flat tip. Therefore, the inclination angle of the concave and convex tips tends to be small, and the reflection of the background tends to occur.
- Rku is preferably 1 or more, more preferably 1.5 or more, further preferably 2 or more, and particularly preferably 2.2 or more. If Rku is too small, background reflection tends to occur. On the other hand, Rku is preferably 10 or less, more preferably 8 or less, further preferably 6 or less, and particularly preferably 4 or less. If Rku is too large, the resolution of the display tends to decrease.
- the ratio of the average inclination angle ( ⁇ ) of the roughness curve of the uneven surface 2 to the kurtosis (Rku) of the roughness curve defined by JIS B0601-2013 of the uneven surface ⁇ / Rku is 0.40 ° or more, preferably 0.5 ° or more, and more preferably 0.6 ° or more. If ⁇ / Rku is too small, background reflection tends to occur. On the other hand, ⁇ / Rku is 1.08 ° or less, preferably 1.0 ° or less, more preferably 0.95 ° or less, and particularly preferably 0.9 ° or less. If ⁇ / Rku is too large, background reflection tends to occur.
- ⁇ is 1.2 ° or more, more preferably 1.5 ° or more, further preferably 1.8 ° or more, and 2 ° or more. Is particularly preferred. If ⁇ is too small, background reflection tends to occur. On the other hand, ⁇ is 7 ° or less, more preferably 5 ° or less, further preferably 4 ° or less, and particularly preferably 3 ° or less. If ⁇ is too large, the display resolution tends to decrease.
- Rku is 2.2 or more, more preferably 2.3 or more, and particularly preferably 2.5 or more. If Rku is too small, background reflection tends to occur. On the other hand, Rku is 10 or less, more preferably 8 or less, further preferably 6 or less, and particularly preferably 4 or less. If Rku is too large, the resolution of the display tends to decrease.
- the ratio of ⁇ and Rku, ⁇ / Rku is preferably 0.40 ° or more, preferably 0.5 ° or more, and 0.6 ° or more. Is more preferable. If ⁇ / Rku is too small, background reflection tends to occur. On the other hand, ⁇ / Rku is preferably 1.08 ° or less, preferably 1.0 ° or less, more preferably 0.95 ° or less, and 0.9 ° or less. Particularly preferred. If ⁇ / Rku is too large, background reflection tends to occur.
- the arithmetic average roughness (Ra) defined by JIS B0601-2013 of the uneven surface 2 is preferably 0.04 ⁇ m or more, more preferably 0.05 ⁇ m or more, and 0.06 ⁇ m or more. Particularly preferred. If Ra is too small, background reflection tends to occur. On the other hand, Ra is preferably 0.3 ⁇ m or less, more preferably 0.25 ⁇ m or less, further preferably 0.2 ⁇ m or less, and particularly preferably 0.15 ⁇ m or less. If Ra is too large, the resolution of the display tends to decrease.
- the root mean square roughness (Rq) defined by JIS B0601-2013 of the uneven surface 2 is preferably 0.05 ⁇ m or more, more preferably 0.06 ⁇ m or more, and 0.07 ⁇ m or more. Is more preferable, and 0.08 ⁇ m or more is particularly preferable. If Rq is too small, background reflection tends to occur. On the other hand, Rq is preferably 0.4 ⁇ m or less, more preferably 0.3 ⁇ m or less, further preferably 0.26 ⁇ m or less, and particularly preferably 0.2 ⁇ m or less. If Rq is too large, the resolution of the display tends to decrease.
- the maximum cross-sectional height (Rt) of the roughness curve defined by JIS B0601-2013 for the uneven surface 2 is preferably 0.2 ⁇ m or more, more preferably 0.3 ⁇ m or more, and 0.4 ⁇ m or more. It is more preferable that it is 0.5 ⁇ m or more. If Rt is too small, background reflection tends to occur. On the other hand, Rt is preferably 3 ⁇ m or less, more preferably 2 ⁇ m or less, further preferably 1.7 ⁇ m or less, and particularly preferably 1 ⁇ m or less. If Rt is too large, the resolution of the display tends to decrease.
- the ten-point average roughness (Rz JIS ) specified by JIS B0601-2013 of the uneven surface 2 is preferably 0.2 ⁇ m or more, more preferably 0.3 ⁇ m or more, and 0.35 ⁇ m or more. It is more preferable that the thickness is 0.4 ⁇ m or more. If Rz JIS is too small, background reflection tends to occur. On the other hand, Rz JIS is preferably 1.6 ⁇ m or less, more preferably 1.4 ⁇ m or less, and particularly preferably 1.2 ⁇ m or less. If Rz JIS is too large, the resolution of the display tends to decrease.
- is preferably 3 or less, more preferably 2.5 or less, and 2 or less. More preferably, it is particularly preferably 1.5 or less.
- the greater the asymmetry of the surface unevenness with respect to the average line.
- the root mean square slope (R ⁇ q) of the roughness curve defined by JIS B0601-2013 of the uneven surface 2 is preferably 0.04 or more, more preferably 0.05 or more, and 0.06 or more. It is particularly preferred that If R ⁇ q is too small, background reflection tends to occur. On the other hand, R ⁇ q is preferably 0.17 or less, more preferably 0.18 or less, and particularly preferably 0.16 or less. If R ⁇ q is too large, the resolution of the display tends to decrease.
- the haze of the display cover member 1 is preferably 1% or more, more preferably 2% or more, still more preferably 3% or more, and particularly preferably 5% or more.
- the haze of the present invention refers to a value measured by a method based on JIS K7136-2000. If the haze is too small, background reflection tends to occur.
- the haze of the display cover member 1 is preferably 50% or less, more preferably 30% or less, still more preferably 20% or less, and particularly preferably 15% or less. If the haze is too large, the resolution of the display tends to decrease.
- the gloss value of the display cover member 1 is preferably 10% or more, more preferably 20% or more, and particularly preferably 30% or more.
- the gloss value of the present invention refers to a value measured at an incident angle of 60 ° by a method based on JIS Z8741-1997. If the gloss value is too small, the resolution of the display tends to decrease.
- the gloss value of the display cover member 1 is preferably 80% or less, more preferably 75% or less, and particularly preferably 70% or less. If the gloss value is too large, background reflection tends to occur.
- the translucent plate 10 and the transparent member are not particularly limited as long as they transmit light from the display.
- the translucent plate 10 and the transparent member are, for example, glass plates such as alkali-free glass, soda-lime glass, tempered glass, crystallized glass plates such as Li 2 O—Al 2 O 3 —SiO 2 based crystallized glass, and resin plates Or the like.
- glass plates such as alkali-free glass, soda-lime glass, tempered glass, crystallized glass plates such as Li 2 O—Al 2 O 3 —SiO 2 based crystallized glass, and resin plates Or the like.
- the translucent plate 10 and the transparent member are made of a tempered glass plate.
- the thickness of the translucent plate 10 and the transparent member is not particularly limited.
- the thickness of the translucent plate 10 and the transparent member can be, for example, about 0.01 mm to 10 mm.
- the translucent plate 10 and the transparent member may be rigid or may have flexibility.
- the translucent plate 10 and the transparent member may be in the form of a sheet.
- the suitably tempered glass plate used transparent plate 10 and the transparent member as a glass composition, in mass%, SiO 2 50% to 80%, Al 2 O 3 5% to 25% or less, B 2 O 3 It is preferable to contain 15% or less, Na 2 O 1% or more and 20% or less, and K 2 O 10% or less.
- SiO 2 50% to 80% SiO 2 50% to 80%
- Al 2 O 3 5% to 25% or less B 2 O 3
- B 2 O 3 It is preferable to contain 15% or less, Na 2 O 1% or more and 20% or less, and K 2 O 10% or less.
- SiO 2 is a component that forms a network of glass.
- the content of SiO 2 is preferably 50% or more and 80% or less.
- a suitable lower limit range of the content of SiO 2 is 52% or more, particularly 55% or more.
- the preferable upper limit range of the content of SiO 2 is 75% or less, 72% or less, 70% or less, particularly 67.5% or less.
- Al 2 O 3 is a component that improves ion exchange performance, and is a component that increases the strain point and Young's modulus.
- the content of Al 2 O 3 is preferably 5% or more and 25% or less. If the content of Al 2 O 3 is too small, the thermal expansion coefficient becomes too high and the thermal shock resistance tends to be lowered, and there is a possibility that the ion exchange performance cannot be sufficiently exhibited. Therefore, the preferable lower limit range of the content of Al 2 O 3 is 7% or more, 8% or more, 10% or more, 12% or more, 14% or more, 15% or more, particularly 16% or more.
- the preferable upper limit range of the content of Al 2 O 3 is 22% or less, 20% or less, 19% or less, 18% or less, particularly 17% or less.
- B 2 O 3 is a component that lowers the high temperature viscosity and density, stabilizes the glass, makes it difficult to precipitate crystals, and lowers the liquidus temperature. It is also a component that increases crack resistance.
- the content of B 2 O 3 is preferably 15% or less. If the content of B 2 O 3 is too large, the surface may be called discoloration due to ion exchange treatment, the water resistance may decrease, the compressive stress value of the compressive stress layer may decrease, or the compressive stress layer The stress depth tends to be small. Therefore, the preferable upper limit range of the content of B 2 O 3 is 15% or less, 12% or less, 10% or less, 8% or less, 6% or less, particularly 5% or less. In the case of introducing the B 2 O 3 in the glass composition, the preferred lower limit range of the content of B 2 O 3 is 0.1% or more, 1% or more, more than 1%, 1.5% or more, particularly 2 % Or more.
- Na 2 O is a main ion exchange component, and is a component that lowers the high temperature viscosity and improves the meltability and moldability. Na 2 O is also a component that improves devitrification resistance.
- the content of Na 2 O is preferably 1% or more and 20% or less. When the Na 2 O content is too small, or reduced meltability, lowered coefficient of thermal expansion tends to decrease the ion exchange performance. Therefore, when Na 2 O is introduced, a preferable lower limit range of Na 2 O is 10% or more, 11% or more, and particularly 12% or more.
- the content of Na 2 O is too large, the thermal expansion coefficient becomes too high, the thermal shock resistance is lowered, and it becomes difficult to match the thermal expansion coefficient of the surrounding materials. In addition, the strain point may be excessively lowered or the component balance of the glass composition may be lost, and the devitrification resistance may be deteriorated. Therefore, a preferable upper limit range of Na 2 O is 17% or less, particularly 16% or less.
- K 2 O is a component that promotes ion exchange, and is a component that has a large effect of increasing the stress depth of the compressive stress layer among alkali metal oxides. Moreover, it is a component which reduces high temperature viscosity and improves a meltability and a moldability. Furthermore, it is also a component that improves devitrification resistance.
- the content of K 2 O is preferably 10% or less. When the content of K 2 O is too large, the thermal expansion coefficient becomes too high, the thermal shock resistance becomes difficult to match or decreased, the thermal expansion coefficient with those of peripheral materials. Moreover, there is a tendency that the strain point is excessively lowered, the component balance of the glass composition is lacking, and the devitrification resistance is lowered. Thus, the preferred upper range of K 2 O is 8% or less, 6% or less, 4% or less, in particular less than 2%.
- Li 2 O is an ion exchange component and a component that lowers the high-temperature viscosity and improves the meltability and moldability. It is also a component that increases Young's modulus. Furthermore, the effect of increasing the compressive stress value is large among alkali metal oxides. However, when the content of Li 2 O is too large, and decreases the liquidus viscosity, it tends glass devitrified. In addition, the thermal expansion coefficient becomes too high, so that the thermal shock resistance is lowered or it is difficult to match the thermal expansion coefficient of the surrounding material. Furthermore, if the low-temperature viscosity is too low and stress relaxation is likely to occur, the compressive stress value may be reduced.
- the preferable upper limit range of the content of Li 2 O is 3.5% or less, 2% or less, 1% or less, 0.5% or less, particularly 0.2% or less.
- the preferred lower limit range of the Li 2 O content is 0.01% or more.
- the suitable content of Li 2 O + Na 2 O + K 2 O is 5 or more and 25% or less.
- a suitable lower limit range of the content of Li 2 O + Na 2 O + K 2 O is 10% or more, 15% or more, particularly 17% or more.
- the content of Li 2 O + Na 2 O + K 2 O is too large, the glass tends to be devitrified, the thermal expansion coefficient becomes too high, the thermal shock resistance decreases, and the heat of the surrounding materials It becomes difficult to match the expansion coefficient.
- the strain point may be excessively lowered, making it difficult to obtain a high compressive stress value.
- Li 2 O + Na 2 O + K 2 O is 22% or less.
- Li 2 O + Na 2 O + K 2 O is the total amount of Li 2 O, Na 2 O and K 2 O.
- MgO is a component that lowers the viscosity at high temperature, increases meltability and moldability, and increases the strain point and Young's modulus.
- MgO is a component that has a large effect of improving ion exchange performance. is there.
- the preferable upper limit range of the content of MgO is 12% or less, 10% or less, 8% or less, 5% or less, and particularly 4% or less.
- the suitable minimum range of MgO is 0.1% or more, 0.5% or more, 1% or more, especially 2% or more.
- CaO compared with other components, has a great effect of lowering the high-temperature viscosity without increasing devitrification resistance, improving meltability and moldability, and increasing the strain point and Young's modulus.
- the preferable upper limit range of the content of CaO is 5% or less, 4% or less, 3% or less, particularly 2.5% or less.
- the suitable minimum range of CaO is 0.01% or more, 0.1% or more, especially 1% or more.
- SrO is a component that lowers the high-temperature viscosity without increasing devitrification resistance, thereby improving meltability and moldability, and increasing the strain point and Young's modulus.
- a preferable upper limit range of the SrO content is 5% or less, 3% or less, 1% or less, particularly less than 0.1%.
- BaO is a component that lowers the high-temperature viscosity without increasing devitrification resistance, thereby increasing meltability and moldability, and increasing the strain point and Young's modulus.
- a suitable upper limit of the content of BaO is 5% or less, 3% or less, 1% or less, particularly less than 0.1%.
- ZnO is a component that enhances the ion exchange performance, and is a component that is particularly effective in increasing the compressive stress value. Moreover, it is a component which reduces high temperature viscosity, without reducing low temperature viscosity.
- the preferable upper limit range of the content of ZnO is 6% or less, 5% or less, 1% or less, 0.5% or less, particularly less than 0.1%.
- ZrO 2 is a component that remarkably improves the ion exchange performance and a component that increases the viscosity and strain point in the vicinity of the liquid phase viscosity, but if its content is too large, the devitrification resistance may be significantly reduced. In addition, the density may be too high. Therefore, the preferable upper limit range of ZrO 2 is 10% or less, 8% or less, 6% or less, particularly 5% or less. In addition, when it is desired to improve the ion exchange performance, it is preferable to introduce ZrO 2 into the glass composition. In this case, the suitable lower limit range of ZrO 2 is 0.001% or more, 0.01% or more, 0.5% In particular, it is 1% or more.
- P 2 O 5 is a component that enhances ion exchange performance, and in particular, a component that increases the stress depth of the compressive stress layer.
- the preferable upper limit range of P 2 O 5 is 10% or less, 8% or less, 6% or less, 4% or less, 2% or less, 1% or less, particularly less than 0.1%.
- one or more selected from the group of As 2 O 3 , Sb 2 O 3 , SnO 2 , F, Cl, and SO 3 are used in an amount of 0 to 30,000 ppm (3%) may be introduced.
- the content of SnO 2 + SO 3 + Cl is preferably 0 to 10,000 ppm, 50 to 5000 ppm, 80 to 4000 ppm, 100 to 3000 ppm, particularly 300 to 3000 ppm, from the viewpoint of accurately enjoying the clarification effect.
- “SnO 2 + SO 3 + Cl” refers to the total amount of SnO 2 , SO 3 and Cl.
- La rare earth oxides such as 2 O 3 is a component improving the Young's modulus, also the addition of color to a complementary color, and decoloration, is a component that can control the color of the glass.
- the cost of the raw material itself is high, and if it is introduced in a large amount, the devitrification resistance tends to decrease. Therefore, the rare earth oxide content is preferably 4% or less, 3% or less, 2% or less, 1% or less, particularly 0.5% or less.
- substantially As 2 O 3 F, PbO , preferably contains no Bi 2 O 3.
- substantially does not contain As 2 O 3 means that the glass component does not positively add As 2 O 3 but allows mixing at the impurity level. This means that the content of As 2 O 3 is less than 500 ppm.
- substantially free of F means that F is not actively added as a glass component but is allowed to be mixed at an impurity level. Specifically, the content of F is less than 500 ppm. It points to something.
- Substantially no PbO means that although PbO is not actively added as a glass component, it is allowed to be mixed at an impurity level.
- the PbO content is less than 500 ppm. It points to something.
- substantially free of Bi 2 O 3 but not added actively Bi 2 O 3 as a glass component, a purpose to allow the case to be mixed with impurity levels, specifically, Bi 2 It indicates that the content of O 3 is less than 500 ppm.
- the translucent plate 10 has a first main surface 10a and a second main surface 10b.
- each of the first and second main surfaces 10a and 10b is a flat surface.
- the second main surface 1 b of the display cover member 1 is constituted by the second main surface 10 b of the translucent plate 10.
- a coating film 11 is provided on the first main surface 10 a of the light transmitting plate 10.
- the coating film 11 covers at least a part of the first main surface 10 a constituting the uneven surface 2.
- the coating film 11 may cover the entire first main surface 10a or may cover a part of the first main surface 10a.
- the coating film 11 may be provided in an island shape, for example.
- the coating film 11 is hard.
- the pencil hardness defined by JIS K5600-5-4-1999 of the coating film 11 is preferably 6H or more, more preferably 7H or more, further preferably 8H or more, and 9H or more. It is still preferred.
- the coating film 11 can be composed of an inorganic film made of an inorganic oxide such as silicon oxide, titanium oxide, aluminum oxide, zirconium oxide or the like. Especially, it is preferable that the coating film 11 is comprised with the silicon oxide.
- the thickness of the coating film 11 is preferably 0.1 ⁇ m or more and 5 ⁇ m or less, for example.
- the coating film 11 is provided directly on the first main surface 10a of the translucent plate 10
- the present invention is not limited to this configuration.
- an antireflection film or the like may be provided between the coating film and the translucent plate.
- an antireflection film, a transparent conductive film, or the like may be provided on the second main surface 10 b of the light transmitting plate 10.
- the antireflection film includes, for example, a low refractive index film having a lower refractive index than the translucent plate 10, or a low refractive index layer having a relatively low refractive index and a high refractive index layer having a relatively high refractive index. It may be a dielectric multilayer film laminated alternately.
- the antireflection film can be formed by, for example, a sputtering method or a CVD method.
- the transparent conductive film functions as an electrode for a touch sensor when the translucent plate 10 is used as a cover glass.
- the transparent conductive film include a tin-doped indium oxide (ITO) film, a fluorine-doped tin oxide (FTO) film, and an antimony-doped tin oxide (ATO) film.
- ITO tin-doped indium oxide
- FTO fluorine-doped tin oxide
- ATO antimony-doped tin oxide
- an ITO film is preferably used because of its low electric resistance.
- the ITO film can be formed by, for example, a sputtering method.
- the FTO film and the ATO film can be formed by a CVD (Chemical Vapor Deposition) method.
- the coating film 11 constitutes the surface of the display cover member 1.
- the present invention is not limited to this configuration.
- an anti-fingerprint film (AF film), anti-reflection film, transparent conductive film, anti-glare function for preventing fingerprint adhesion and imparting water repellency and oil repellency is visually recognized.
- Another film such as an anti-glare film for improving the writing performance with a touch pen or the like, and an antifouling film for preventing the attachment of fingerprints and imparting water repellency and oil repellency are further provided. It may be done.
- the anti-fingerprint film preferably contains a fluorinated polymer containing silicon in the main chain.
- the fluorine-containing polymer include polymers having —Si—O—Si— units in the main chain and having water-repellent functional groups containing fluorine in the side chain.
- the fluorine-containing polymer can be synthesized, for example, by dehydrating condensation of silanol.
- the transparent conductive film may be formed on the back side of the translucent plate 10 (display device side, second main surface side of the translucent plate).
- the transparent conductive film functions as an electrode for a touch sensor when the translucent plate 10 is used as a cover glass.
- the antireflection film and the AF film are formed on the uneven surface side of the coating film 11 or the uneven surface of the transparent member, the antireflection film is formed on the uneven surface, and the AF film is formed on the antireflection film. Preferably it is formed.
- the coating film 11 does not contain scattering particles like a fine particle dispersion film, and is preferably a homogeneous film. In this case, the resolution can be further increased and the reflection can be more effectively suppressed.
- the coating film 11 preferably has a lower refractive index than the translucent plate 10. In that case, reflection can be more effectively suppressed.
- the translucent plate 10 is prepared.
- a translucent material is applied on the first main surface 10a of the translucent plate 10 by a spray method and dried to form the coating film 11.
- a spray method By forming the coating film 11 using the spray method, it becomes easy to set RSm and ⁇ / Rku within a preferable range.
- the coating film 11 can be formed as follows. While the translucent plate 10 is being transported in the coating chamber, the translucent material is discharged from the nozzles toward the translucent plate 10 while reciprocating the nozzle in a direction perpendicular to the transport direction of the translucent plate 10. To go. Then, the coating film 11 can be completed by drying the obtained coating film. During film formation, it is preferable to apply a laminar flow that flows downward from above to the coating chamber.
- the RSm and ⁇ / Rku of the display cover member 1 to be manufactured can be adjusted by controlling, for example, the flow rate of air flowing through the nozzle, the amount discharged per unit area, the flow rate of laminar flow, and the like.
- ⁇ / Rku can be increased by reducing the ratio of the coating amount per unit area to the flow rate of air flowing through the nozzle, and the coating amount (g / m 2 ) / air flow rate (m 2 / min). .
- the coating amount (g / m 2 ) / air flow rate (m 2 / min) is preferably 0.05 or less, for example.
- the coating film 11 may be formed on the tempered glass plate, or after the coating film 11 is formed on the glass plate, the glass plate May be strengthened by chemical strengthening or air cooling strengthening.
- the display cover member 1 is composed of a single transparent member having an uneven surface
- the main surface of the transparent member is subjected to a surface treatment such as a frost treatment, a sand blast treatment, or a wet blast treatment to form a desired unevenness. You can use the method to do.
- the frost treatment is, for example, a treatment for forming irregularities on the main surface of the transparent member by immersing the transparent member in a mixed solution of hydrogen fluoride and ammonium fluoride and chemically treating the immersion surface.
- frost treatment using a chemical such as hydrogen fluoride is preferable because microcracks are hardly generated on the surface of the object to be processed and mechanical strength is not easily lowered.
- Sand blasting is a process for forming irregularities on the main surface of a transparent member by, for example, spraying crystalline silicon dioxide powder, silicon carbide powder or the like onto the surface of the transparent member with pressurized air.
- it is generally performed to chemically etch the glass surface in order to adjust the surface shape. By doing so, it is possible to remove cracks generated by sandblasting or the like.
- etching a method of immersing a transparent substrate, which is an object to be processed, in a solution containing hydrogen fluoride as a main component is preferably used.
- Wet blasting is a process in which abrasive particles composed of solid particles such as alumina and a liquid such as water are uniformly stirred to form a slurry at high speed from the injection nozzle to the surface of the transparent member using compressed air. This is a process for forming irregularities on the main surface of the transparent member by spraying with the above.
- the surface roughness of the uneven surface formed on the main surface of the transparent member by wet blasting can be adjusted mainly by the particle size distribution of the abrasive grains contained in the slurry and the injection pressure when the slurry is injected onto the transparent member. is there.
- Examples 1 to 9 and Comparative Examples 1 to 4 On a tempered glass flat plate (Nippon Electric Glass Co., Ltd. tempered glass flat plate, thickness 0.7 mm), a liquid containing a silicon oxide component is applied by a spray method and dried to form a coating film made of silicon oxide. A display cover member was obtained. Detailed conditions are shown in Tables 1 and 2.
- the present invention is suitable for a cover member for a display with little background reflection and excellent antiglare property.
- cover member 1a first main surface 1b: second main surface 2: uneven surface 10: translucent plate 10a: first main surface 10b: second main surface 11: coating film
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Abstract
Description
平均傾斜角(θ)=tan-1Δa ……… (1)
Δa=(h1+h2+h3・・・+hn)/l ……… (2)
強化ガラス平板(日本電気硝子株式会社製強化ガラス平板、厚み0.7mm)の上に、酸化ケイ素成分を含む液をスプレー法により塗布し、乾燥させることにより、酸化ケイ素からなるコーティング膜を形成し、ディスプレイ用カバー部材を得た。詳細な条件は、表1、2に示す。
実施例1~9及び比較例1~4のディスプレイ用カバー部材の凹凸面におけるJIS B0601-2013で規定される表面性状パラメータ(RSm、θ、Rku、Ra、Rq、Rt、RzJIS、|Rsk|、Rdq)を、非接触表面・層断面形状計測システム VertScan2.0(菱化システム社製)を用いて測定した。結果を表1、2に示す。
JIS K7136-2000に基づいて、実施例1~9及び比較例1~4のディスプレイ用カバー部材のヘイズを、NDH-5000(日本電色社製)を用いて測定した。結果を表1、2に示す。
JIS Z8741-1997に基づいて、実施例1~9及び比較例1~4のディスプレイ用カバー部材における入射角60°のグロス値を、IG-331(堀場製作所社製)を用いて測定した。結果を表1、2に示す。
ディスプレイ用カバー部材の裏面にメンディングテープ(3M社製)を貼り付け、カバー部材凹凸面に蛍光灯を反射させた。その反射させた蛍光灯がぼやけて全く見えないものを◎、やや見えるもののぼやけているものを○、蛍光灯が見えるがややぼやけているものを△、蛍光灯がくっきり見えるものを×という判定を行った。結果を表1、2に示す。
画素ピッチ264ppiのディスプレイの上に実施例1~9及び比較例1~4のディスプレイ用カバー部材を配置し、ギラツキ度合いを観察した。その際、ギラツキが確認できなかったものを○、ギラツキが確認できたものを×という判定を行った。結果を表1、2に示す。
JIS K5600-5-4-1999に基づいて、実施例1~9及び比較例1~4のディスプレイ用カバー部材におけるコーティング膜の鉛筆硬度を、HEIDON表面性試験機を用いて、鉛筆角度45゜、引っ掻き速度100mm/分、荷重750gの条件で、三菱鉛筆HI-uniを用いて評価した。結果を表1、2に示す。
1a:第1の主面
1b:第2の主面
2:凹凸面
10:透光板
10a:第1の主面
10b:第2の主面
11:コーティング膜
Claims (14)
- 一方の主面が凹凸面により構成されており、前記凹凸面のJIS B0601-2013で規定される粗さ曲線要素の平均長さ(RSm)が1μm以上30μm以下であり、前記凹凸面の粗さ曲線の平均傾斜角(θ)と前記凹凸面のJIS B0601-2013で規定される粗さ曲線のクルトシス(Rku)の比、θ/Rkuが0.40°以上1.08°以下であることを特徴とするディスプレイ用カバー部材。
- 一方の主面が凹凸面により構成されており、前記凹凸面のJIS B0601-2013で規定される粗さ曲線要素の平均長さ(RSm)が1μm以上30μm以下であり、前記凹凸面の粗さ曲線の平均傾斜角(θ)が1.2°以上7°以下であり、前記凹凸面のJIS B0601-2013で規定される粗さ曲線のクルトシス(Rku)が2.2以上10以下であることを特徴とするディスプレイ用カバー部材。
- ヘイズが1%以上50%以下であることを特徴とする請求項1または2に記載のディスプレイ用カバー部材。
- 前記凹凸面のJIS B0601-2013で規定される算術平均粗さ(Ra)が0.04μm以上0.25μm以下であることを特徴とする請求項1~3のいずれか一項に記載のディスプレイ用カバー部材。
- 前記凹凸面のJIS B0601-2013で規定される粗さ曲線のスキューネス(Rsk)の絶対値、|Rsk|が2以下であることを特徴とする請求項1~4のいずれか一項に記載のディスプレイ用カバー部材。
- 透光板と、前記透光板の一主面の少なくとも一部を覆っており、前記凹凸面を構成しているコーティング膜とを備えることを特徴とする請求項1~5のいずれか一項に記載のディスプレイ用カバー部材。
- 前記コーティング膜が前記透光板の一主面の全体を覆っていることを特徴とする請求項6に記載のディスプレイ用カバー部材。
- 前記コーティング膜が、無機膜により構成されていることを特徴とする請求項6または7に記載のディスプレイ用カバー部材。
- 前記コーティング膜のJIS K5600-5-4-1999で規定される鉛筆硬度が6H以上であることを特徴とする請求項6~8のいずれか一項に記載のディスプレイ用カバー部材。
- 前記透光板が、ガラス板により構成されていることを特徴とする請求項6~9のいずれか一項に記載のディスプレイ用カバー部材。
- 前記ガラス板が、強化ガラス板により構成されていることを特徴とする請求項10に記載のディスプレイ用カバー部材。
- 請求項1~11のいずれか一項に記載のディスプレイ用カバー部材を製造する方法であって、
前記透光板の上に、スプレー法により前記凹凸面を構成するコーティング膜を形成することを特徴とするディスプレイ用カバー部材の製造方法。 - 前記透光板をガラス板により構成し、
前記コーティング膜を形成した後に、前記ガラス板を化学強化することを特徴とする請求項11に記載のディスプレイ用カバー部材の製造方法。 - 前記透光板として、強化ガラス板を用いることを特徴とする請求項11に記載のディスプレイ用カバー部材の製造方法。
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CN107683267A (zh) | 2018-02-09 |
EP3348524B1 (en) | 2022-11-23 |
TW201718425A (zh) | 2017-06-01 |
TWI690501B (zh) | 2020-04-11 |
US20190284091A1 (en) | 2019-09-19 |
EP3588148B1 (en) | 2022-08-24 |
CN117331157A (zh) | 2024-01-02 |
EP3588148A1 (en) | 2020-01-01 |
KR102621208B1 (ko) | 2024-01-04 |
EP3348524A4 (en) | 2019-04-24 |
EP3348524A1 (en) | 2018-07-18 |
JPWO2017043538A1 (ja) | 2018-06-28 |
US11884576B2 (en) | 2024-01-30 |
US11884577B2 (en) | 2024-01-30 |
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US20180251398A1 (en) | 2018-09-06 |
KR20180050606A (ko) | 2018-05-15 |
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