WO2020218056A1 - Verre couvre-objet et signalisation numérique - Google Patents

Verre couvre-objet et signalisation numérique Download PDF

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Publication number
WO2020218056A1
WO2020218056A1 PCT/JP2020/016268 JP2020016268W WO2020218056A1 WO 2020218056 A1 WO2020218056 A1 WO 2020218056A1 JP 2020016268 W JP2020016268 W JP 2020016268W WO 2020218056 A1 WO2020218056 A1 WO 2020218056A1
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Prior art keywords
cover glass
glass plate
inorganic paint
glare
layer
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PCT/JP2020/016268
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English (en)
Japanese (ja)
Inventor
耕司 池上
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日本電気硝子株式会社
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Priority to JP2021516000A priority Critical patent/JPWO2020218056A1/ja
Publication of WO2020218056A1 publication Critical patent/WO2020218056A1/fr

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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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/42—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating of an organic material and at least one non-metal coating
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • the present invention relates to a cover glass and digital signage using the same.
  • Patent Document 1 discloses a translucent structure having a concavo-convex structure for enhancing antiglare and the like.
  • An object of the present invention is to provide a cover glass and digital signage that can effectively enhance visibility.
  • the cover glass of the present invention includes a glass plate, an anti-glare layer provided on the glass plate, and an antireflection film provided on the anti-glare layer, and has an image sharpness of DOI, a glossiness of G, and a haze.
  • Is H the glare index value is S
  • the reflection index value is C
  • the visibility parameter P in the following equation (1) is 150 or more and 2000 or less.
  • the cover glass further includes an antifouling layer provided on the antireflection film.
  • the digital signage of the present invention is characterized by including the above-mentioned cover glass.
  • FIG. 1 is a front sectional view of a cover glass according to an embodiment of the present invention.
  • FIG. 2 is a photograph of the cover glass of Comparative Example 1.
  • FIG. 3 is a photograph of the cover glass of Comparative Example 2.
  • FIG. 4 is a photograph of the cover glass of Example 1.
  • FIG. 5 is a photograph of the cover glass of Example 2.
  • FIG. 6 is a photograph of the cover glass of Example 3.
  • FIG. 7 is a photograph of the cover glass of Example 4.
  • FIG. 8 is a photograph of the cover glass of Example 1 and Comparative Example 2 under sunlight.
  • FIG. 1 is a front sectional view of a cover glass according to an embodiment of the present invention.
  • the cover glass 1 shown in FIG. 1 can be used for a display.
  • the cover glass 1 is provided on the glass plate 2, the anti-glare layer 3 provided on the glass plate 2, the anti-reflection film 4 provided on the anti-glare layer 3, and the anti-reflection film 4 as needed.
  • the antifouling layer 5 is provided. By providing the antireflection film 4 on the antiglare layer 3, the bright contrast of the cover glass 1 can be improved.
  • the glass plate 2 can be made of, for example, non-alkali glass, soda lime glass, borosilicate glass, aluminosilicate glass, chemically tempered glass, or the like.
  • the anti-glare layer 3 has an uneven structure.
  • the anti-glare layer 3 is provided to provide a so-called anti-glare effect that suppresses reflection of external light and the like.
  • the anti-glare layer 3 preferably has an uneven structure composed of an inorganic substance.
  • the inorganic substance constituting such an anti-glare layer 3 preferably contains oxides such as silica, alumina, zirconia, and titania, and can be formed from an inorganic paint.
  • oxides such as silica, alumina, zirconia, and titania
  • an inorganic paint As the main component of the inorganic coating material, a silica precursor, an alumina precursor, a zirconia precursor, a titania precursor, or the like can be used. Of these, silica precursors are particularly preferably used.
  • the inorganic paint may contain inorganic particles.
  • silica precursor examples include alkoxysilanes such as tetraethoxysilane and tetramethoxysilane, hydrolyzed condensates of alkoxysilane (sol-gel silica), and silazane. From the viewpoint of further enhancing the antiglare effect, tetraethoxysilane and the like. An alkoxysilane such as tetramethoxysilane and at least one of their hydrolyzed condensates are preferable, and a hydrolyzed condensate of tetraethoxysilane is more preferable.
  • alumina precursor examples include aluminum alkoxide, a hydrolyzed condensate of aluminum alkoxide, a water-soluble aluminum salt, and an aluminum chelate.
  • zirconia precursor examples include zirconium alkoxide and a hydrolyzed condensate of zirconium alkoxide.
  • titania precursor examples include titanium alkoxide and a hydrolyzed condensate of titanium alkoxide.
  • examples of the inorganic particles include silica particles, alumina particles, zirconia particles, titania particles and the like. Among these, silica particles are particularly preferably used.
  • the anti-glare layer 3 can be formed by applying the above-mentioned inorganic paint on the glass plate 2.
  • the inorganic paint can be applied onto the glass plate 2 by the spray coating method. After coating, it is dried and fired to form an anti-glare layer 3 made of an inorganic substance.
  • the average thickness of the anti-glare layer 3 is preferably 0.1 ⁇ m or more and 2 ⁇ m or less, more preferably 0.15 ⁇ m or more and 1.75 ⁇ m or less, and further preferably 0.2 ⁇ m or more and 1 ⁇ m or less. ..
  • the antireflection film 4 can be formed from, for example, a dielectric multilayer film.
  • a dielectric multilayer film a low refractive index layer made of a silicon oxide layer and a high one made of an oxide of at least one metal selected from the group consisting of niobium, titanium, zirconium, yttrium, tungsten, aluminum and hafnium.
  • a laminated film having a refractive index layer can be mentioned. It is preferable to have a niobium oxide layer as the high refractive index layer. It is preferable that the low refractive index layer and the high refractive index layer are alternately laminated.
  • each layer constituting the antireflection film 4 is preferably 1 nm or more and 300 nm or less, more preferably 2 nm or more and 200 nm or less, and further preferably 3 nm or more and 150 nm or less. Further, the total number of layers constituting the antireflection film 4 is preferably 2 or more and 6 or less. By setting the temperature within such a range, an effective and easily formable film can be obtained.
  • the antireflection film 4 can be formed by, for example, a sputtering method, a CVD method, a vacuum vapor deposition method, or the like.
  • the overall thickness of the antireflection film 4 is preferably 50 nm or more and 1000 nm or less, more preferably 75 nm or more and 750 nm or less, and further preferably 100 nm or more and 500 nm or less.
  • the antifouling layer 5 preferably contains an organosilicon compound.
  • the adhesion with the antireflection film 4 can be enhanced.
  • the antifouling layer 5 is difficult to peel off even after long-term use.
  • organosilicon compound examples include one or more compounds selected from a silane coupling agent, a silicone oil, a silicone resin, a silicone rubber, a hydrophobic silica, and a fluorine-containing organosilicon compound.
  • the thickness of the antifouling layer 5 is preferably 0.5 nm or more and 20 nm or less, more preferably 0.75 nm or more and 15 nm or less, and further preferably 1 nm or more and 10 nm or less.
  • the method for forming the antifouling layer 5 is not particularly limited, and for example, it can be formed by applying a diluted solution of an organosilicon compound or the like by a spray coating method or the like.
  • index values of visibility image sharpness (DOI: Digitaless of Image), glossiness (G: Gloss), haze (H: Haze), glare index value (S: Sparkle), and reflection index value (C: Sparkle) Clarity) and the like.
  • Image sharpness DOI is an index related to visual resolution or clarity. The smaller the image sharpness DOI, the more visually obscured, and the larger the image sharpness DOI, the more visually clear.
  • the image sharpness DOI is preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more.
  • the upper limit of the image sharpness DOI is not particularly limited, but can be, for example, 90%.
  • Glossiness G is an index showing the degree of light reflection. The lower the glossiness G, the lower the degree of reflection and the better the visibility.
  • the glossiness G is preferably 100 or less, more preferably 80 or less, and even more preferably 60 or less.
  • the lower limit of the glossiness G is not particularly limited, but may be, for example, 15.
  • Haze H is an index of translucency, which indicates the degree of cloudiness of the translucent body. The lower the haze H, the lower the degree of cloudiness and the better the visibility.
  • the haze H is preferably 60% or less, more preferably 50% or less, and even more preferably 40% or less.
  • the lower limit of haze H is not particularly limited, but may be, for example, 10%.
  • the glare index value S indicates the degree to which RGB pixels and uneven brightness appear to flicker as a large number of light spots on a display or the like.
  • the lower the glare index value S the lower the degree of glare and the better the visibility.
  • the glare index value S is preferably 6% or less, more preferably 5% or less, and further preferably 4% or less.
  • the lower limit of the glare index value S is not particularly limited, but may be, for example, 1.5%.
  • the reflection index value C is an index indicating the degree to which outside light is reflected.
  • the reflection index value C is preferably 6% or less, more preferably 5% or less, and further preferably 4% or less.
  • the lower limit of the reflection index value C is not particularly limited, but may be, for example, 2%.
  • the visibility parameter P in the following formula (1) is 150 or more and 2000 or less when the visibility parameter is P. Thereby, the visibility can be effectively enhanced. This will be described below.
  • the haze H and the reflection index value C may have a trade-off relationship, or the image sharpness DOI and the reflection index value C may have a trade-off relationship. Therefore, in reality, it is difficult to set all of the image sharpness DOI, the glossiness G, the haze H, the glare index value S, and the reflection index value C as ideal values.
  • the outdoor environment for visibility under sunlight is very different from the indoor environment. Therefore, it is difficult to sufficiently improve the visibility of the display or the like outdoors with the conventional cover glass or the like.
  • the visibility parameter P is defined by the above equation (1). Although multiple factors such as image sharpness DOI, glossiness G, haze H, glare index value S, and reflection index value C have a complex effect on visibility, the visibility parameter P should be specified. Therefore, a complex index can be obtained. Further, in the present embodiment, the visibility parameter P is set to 150 or more and 2000 or less. That is, the inventor effectively enhances the visibility by keeping the image sharpness DOI, the glossiness G, the haze H, the glare index value S and the reflection index value C in a well-balanced manner so as to fall within this range. I found that I could do it.
  • the cover glass 1 is particularly preferably used for digital signage or the like arranged outdoors. However, the cover glass 1 is also suitably used for a display used indoors.
  • the visibility parameter P is preferably 200 or more, more preferably 300 or more, further preferably 400 or more, and even more preferably 500 or more.
  • the visibility parameter P is preferably 1750 or less, more preferably 1500 or less, further preferably 1000 or less, and even more preferably 800 or less. Thereby, the visibility can be further improved.
  • the anti-glare layer 3 is formed on the glass plate 2.
  • an inorganic paint for the anti-glare layer 3 can be applied onto the glass plate 2 by a spray coating method.
  • the nozzle used in the spray coating method include a two-fluid nozzle and a one-fluid nozzle.
  • the directions orthogonal to each other are defined as the x direction and the y direction.
  • the inorganic paint may be applied while moving the nozzle in the x direction, the nozzle may be moved in the y direction, and then the inorganic paint may be applied while moving the nozzle in the x direction again.
  • the firing temperature can be, for example, 160 ° C. or higher and 200 ° C. or lower.
  • the obtained glass plate with a coating film is washed with water.
  • the coated glass plate is dried, and then the coated glass plate is washed by plasma treatment. The above cleaning does not have to be performed.
  • the inorganic paint for the anti-glare layer 3 is applied again on the glass plate with a coating film. It is then dried and then fired. From the above, the anti-glare layer 3 can be formed.
  • the inorganic paint twice in this way, or by selecting the main component of the inorganic paint and adding inorganic particles as needed, the type of nozzle, atomized air pressure, and inorganic paint liquid.
  • the coating conditions such as the flow rate of the nozzle, the moving speed of the nozzle, the moving pitch of the nozzle, the temperature / humidity at the time of coating, the surface temperature of the glass plate, and the particle size of the droplets of the coating liquid sprayed from the nozzle.
  • the sex parameter P can be effectively adjusted, and the visibility parameter P can be adjusted more reliably within the range of 150 or more and 2000 or less.
  • the second application of the inorganic paint may be performed without firing and cleaning. Even in this case, the visibility parameter P can be effectively adjusted.
  • the inorganic paint does not necessarily have to be applied twice, and the anti-glare layer 3 may be formed by applying the inorganic paint once.
  • the antireflection film 4 is formed on the antiglare layer 3.
  • a low refractive index layer having a relatively low refractive index and a high refractive index layer having a relatively high refractive index are alternately alternately formed by a sputtering method, a CVD method, a vacuum vapor deposition method, or the like. Laminate. As a result, the antireflection film 4 can be formed.
  • the antifouling layer 5 is formed on the antireflection film 4.
  • the antifouling layer 5 can be formed, for example, by applying a diluted solution of an organosilicon compound or the like by a spray coating method or the like.
  • the visibility parameter P may be adjusted by adjusting the combination of the materials and film thicknesses of the antiglare layer 3, the antireflection film 4, and the antifouling layer 5.
  • the digital signage of the present invention includes the cover glass 1 and a display element.
  • the cover glass 1 may be any cover glass according to the present invention.
  • the display element has a display surface.
  • the display surface is a surface on which an image is displayed.
  • a cover glass 1 is provided on the display surface. Since the digital signage includes the cover glass 1 of the present invention, visibility can be effectively enhanced.
  • Example 1 First, a 100 mm square glass plate having a thickness of 0.5 mm, which was made of non-alkali glass, was prepared. Next, an inorganic paint containing an alkoxide such as tetraethoxysilane was applied onto the glass plate by a spray coating method.
  • the direction in which one piece of the main surface of the glass plate extends is defined as the x direction
  • the direction orthogonal to the x direction is defined as the y direction.
  • the moving speed of the nozzle in the x direction was 45 m / min
  • the flow rate of the inorganic paint was 4.8 g / min
  • the moving pitch of the nozzle in the y direction was 2 mm.
  • the humidity at the time of application was 54.7%
  • the air temperature was 19.6 ° C.
  • the inorganic paint on the glass plate was fired at 180 ° C. Next, the obtained glass plate with a coating film was washed with water. Next, the coated glass plate was dried, and then the coated glass plate was washed by plasma treatment.
  • the same inorganic paint as above was applied again by the spray coating method on the glass plate with a coating film.
  • the moving speed of the nozzle in the x direction was 45 m / min
  • the flow rate of the inorganic paint was 4.8 g / min
  • the moving pitch of the nozzle in the y direction was 2 mm.
  • the humidity at the time of application was 55.3%
  • the air temperature was 19.6 ° C.
  • the inorganic paint on the coated glass plate was fired at 180 ° C. As a result, an anti-glare layer was formed on the glass plate.
  • the average thickness of the anti-glare layer was 0.35 ⁇ m.
  • a low refractive index layer made of silicon oxide was formed on the antiglare layer by a sputtering method.
  • a high refractive index layer made of niobium oxide was formed on the low refractive index layer by a sputtering method.
  • an antireflection film composed of a laminate of a low refractive index layer and a high refractive index layer was formed on the antiglare layer.
  • the low refractive index layer was two layers, and the thickness of each layer was 35 nm and 78 nm in order from the glass plate side.
  • the high refractive index layer was two layers, and the thickness of each layer was 10 nm and 106 nm in order from the glass plate side.
  • the antireflection film as a whole was 229 nm.
  • a diluted solution of a fluorine-based antifouling liquid was applied onto the antireflection film by a spray coating method, and then dried to form an antifouling layer.
  • the thickness of the antifouling layer was 4 nm.
  • Example 2 When forming the anti-glare layer, a cover glass was produced in the same manner as in Example 1 except that the second inorganic paint was applied without firing and cleaning after the first application of the inorganic paint. Specifically, when forming the anti-glare layer, the same inorganic paint as in Example 1 was applied onto the glass plate by the spray coating method. The moving speed of the nozzle in the x direction was 45 m / min, the flow rate of the inorganic paint was 4.8 g / min, and the moving pitch of the nozzle in the y direction was 2 mm. Next, the same inorganic paint as above was applied again by the spray coating method on the inorganic paint applied on the glass plate.
  • the moving speed of the nozzle in the x direction was 45 m / min
  • the flow rate of the inorganic paint was 4.8 g / min
  • the moving pitch of the nozzle in the y direction was 2 mm.
  • the humidity at the time of application was 54.7%
  • the air temperature was 19.6 ° C.
  • the inorganic paint on the glass plate was fired at 180 ° C. As a result, an anti-glare layer was formed on the glass plate.
  • the average thickness of the anti-glare layer was 0.33 ⁇ m.
  • Example 3 A cover glass was produced in the same manner as in Example 1 except that the humidity and temperature at the time of the first and second application of the inorganic paint were different from those in Example 1 when the anti-glare layer was formed. Specifically, the humidity at the time of the first application of the inorganic paint was 50.9%, and the temperature was 19.9 ° C. The humidity at the time of the second application of the inorganic paint was 51.2%, and the temperature was 19.9 ° C. The average thickness of the anti-glare layer was 0.47 ⁇ m.
  • Example 4 A cover glass was produced in the same manner as in Example 2 except that the humidity and temperature at the time of applying the inorganic paint were different from those in Example 2 when the anti-glare layer was formed. Specifically, the humidity at the time of applying the inorganic paint was 50.9%, and the temperature was 19.9 ° C. The average thickness of the anti-glare layer was 0.49 ⁇ m.
  • Example 5 A cover glass was produced in the same manner as in Example 2 except that the humidity and temperature at the time of applying the inorganic paint were different from those in Example 2 when the anti-glare layer was formed. Specifically, the humidity at the time of applying the inorganic paint was 52.8%, and the temperature was 21.4 ° C.
  • Example 6 The same as in Example 2 except that the inorganic paint was applied once when the anti-glare layer was formed, and the conditions for applying the inorganic paint by the spray coating method and the humidity and temperature at the time of application were different from those in Example 2.
  • the moving speed of the nozzle in the x direction was 55 m / min
  • the flow rate of the inorganic paint was 4.8 g / min
  • the moving pitch of the nozzle in the y direction was 1 mm.
  • the humidity at the time of applying the inorganic paint was 52.8%
  • the temperature was 21.4 ° C.
  • Example 7 A cover glass was produced in the same manner as in Example 1 except that the conditions for applying the inorganic paint by the spray coating method and the humidity and temperature at the time of application were different from those in Example 1 when forming the anti-glare layer. Specifically, at the time of applying the inorganic paint for the first time and the second time, the moving speed of the nozzle in the x direction is 55 m / min, the flow rate of the inorganic paint is 4.8 g / min, and the moving pitch of the nozzle in the y direction. was 1 mm. The humidity at the time of the first and second application of the inorganic paint was 49.4%, and the temperature was 22.4 ° C.
  • Example 8 When forming the anti-glare layer, the inorganic paint was applied once, and the temperature of the glass plate at the time of applying the inorganic paint was different from that of Example 2.
  • a cover glass was produced in the same manner as in Example 2 except that the conditions for applying the inorganic paint by the spray coating method and the humidity and temperature at the time of application were different from those in Example 2. Specifically, when forming the anti-glare layer, the glass plate was heated and the surface temperature was set to 49.0 ° C., and the same inorganic paint as in Example 2 was applied onto the glass plate.
  • the moving speed of the nozzle in the x direction was 45 m / min
  • the flow rate of the inorganic paint was 4.8 g / min
  • the moving pitch of the nozzle in the y direction was 1 mm.
  • the humidity at the time of applying the inorganic paint was 52.2%, and the temperature was 20.0 ° C.
  • Example 9 A protective film was attached to the surface of the glass plate on the side where the anti-glare layer was not provided.
  • the glass plate was etched. Specifically, the glass plate was immersed in a 3% by weight hydrogen fluoride solution for 3 minutes. By performing the etching treatment in this way, dirt adhering to the surface of the glass plate was removed.
  • the surface of the glass plate was frosted. Specifically, the glass plate was immersed in a mixed solution of 15% by weight hydrogen fluoride and 15% by weight potassium fluoride. The immersion temperature was 23 ° C. and the immersion time was 60 seconds. As a result, an anti-glare layer was formed.
  • the glass plate was immersed in a 10% hydrogen fluoride solution for 6 minutes for etching. Then, the antireflection film and the antifouling layer were formed in the same manner as in Example 1 to obtain a cover glass.
  • Example 10 A protective film was attached to the surface of the glass plate on the side where the anti-glare layer was not provided. Next, sandblasting was performed on the surface on the side to which the protective film was not attached. Next, the glass plate was etched. Specifically, the glass plate was immersed in a 3% by weight hydrogen fluoride solution for 3 minutes. By performing the etching treatment in this way, dirt adhering to the surface of the glass plate was removed. Next, the surface of the glass plate was frosted. Specifically, the glass plate was immersed in a mixed solution of 15% by weight hydrogen fluoride and 15% by weight potassium fluoride. The immersion temperature was 23 ° C. and the immersion time was 360 seconds. As a result, an anti-glare layer was formed.
  • the glass plate was immersed in a 10% hydrogen fluoride solution for 6 minutes for etching. Then, the antireflection film and the antifouling layer were formed in the same manner as in Example 1 to obtain a cover glass.
  • Example 1 When forming the anti-glare layer, the cover glass was produced in the same manner as in Example 1 except that the inorganic paint was applied once and the conditions for applying the inorganic paint by the spray coating method were different from those in Example 1. .. Specifically, the moving speed of the nozzle in the x direction was 45 m / min, the flow rate of the inorganic paint was 2.0 g / min, and the moving pitch of the nozzle in the y direction was 5 mm.
  • Example 2 the inorganic paint on the glass plate was fired at 180 ° C. in the same manner as in Example 1. As a result, an anti-glare layer was formed on the glass plate.
  • the average thickness of the anti-glare layer was 0.05 ⁇ m.
  • Example 2 Examples except that the temperature of the glass plate when the inorganic paint was applied, the conditions for applying the inorganic paint by the spray coating method, and the humidity and temperature at the time of application were different from those of Example 2 when forming the anti-glare layer.
  • a cover glass was produced in the same manner as in 2. Specifically, when forming the anti-glare layer, the glass plate was heated and the surface temperature was set to 48.2 ° C., and the same inorganic paint as in Example 2 was applied onto the glass plate.
  • the moving speed of the nozzle in the x direction was 60 m / min
  • the flow rate of the inorganic paint was 4.8 g / min
  • the moving pitch of the nozzle in the y direction was 1 mm.
  • the humidity at the time of application was 52.0%, and the air temperature was 20.0 ° C.
  • the average thickness of the anti-glare layer was 1.1 ⁇ m.
  • Example 3 When forming the anti-glare layer, the inorganic paint was applied once, and the temperature of the glass plate at the time of applying the inorganic paint was different from that of Example 2.
  • a cover glass was produced in the same manner as in Example 2 except that the conditions for applying the inorganic paint by the spray coating method and the humidity and temperature at the time of application were different from those in Example 2.
  • the glass plate was heated and the surface temperature was set to 48.2 ° C., and the same inorganic paint as in Example 2 was applied onto the glass plate.
  • the moving speed of the nozzle in the x direction was 45 m / min
  • the flow rate of the inorganic paint was 4.8 g / min
  • the moving pitch of the nozzle in the y direction was 1 mm.
  • the humidity at the time of applying the inorganic paint was 52.0%, and the temperature was 20.0 ° C.
  • Comparative Example 4 A cover glass was produced in the same manner as in Comparative Example 3 except that the temperature of the glass plate when the inorganic paint was applied and the humidity when the inorganic paint was applied were different from those in Comparative Example 3 when forming the anti-glare layer. did. Specifically, when forming the anti-glare layer, the glass plate was heated to set the surface temperature to 43.8 ° C. The humidity at the time of applying the inorganic paint was 51.8%.
  • Example 5 A cover glass was produced in the same manner as in Example 9 except that the immersion time in the frost treatment was different from that in Example 9. Specifically, the immersion time in the frost treatment was set to 180 seconds.
  • the cover glass is the same as in Comparative Example 3 except that the temperature of the glass plate when the inorganic paint is applied and the humidity and temperature when the inorganic paint is applied are different from those of Comparative Example 3.
  • the glass plate was heated to set the surface temperature to 48.2 ° C.
  • the humidity at the time of applying the inorganic paint was 45.5%, and the temperature was 21.1 ° C.
  • Examples 1 to 8 and Comparative Examples 1 to 4 and 6 are summarized in Table 1 below.
  • the conditions of Examples 9 and 10 and Comparative Example 5 are separately shown in Table 2 below.
  • Image sharpness DOI was measured using SMS-1000 (manufactured by Display-Mestechnik & System) based on ASTM D 5767.
  • glossiness G the glossiness G at an incident angle of 60 ° on the cover glass was measured using Microgloss (60 °) (manufactured by BYK) based on JIS Z 8741: 1997.
  • Haze H was measured using NDH-5000 (manufactured by Nippon Denshoku Co., Ltd.) based on JIS K 7136: 2000.
  • the glare index value S was measured in a sparkle measurement mode using SMS-1000 (manufactured by Display-Mestechnik & System).
  • the number of pixels of the SMS-1000 CCD camera is 1296 ⁇ 966, the sensor size is 1/3 type, and the pixel size is 3.75 ⁇ 3.75 ⁇ m.
  • the focal length of the lens was set to 100 mm, the aperture diameter of the lens was set to 4.5 mm, the magnification ratio was set to 1: 1, and the permissible circle of confusion diameter was set to 53 ⁇ m.
  • the pattern mask was arranged so that the top surface was located at the focal position of the lens.
  • the reflection index value C was measured in a reflection distribution measurement mode using SMS-1000 (manufactured by Display-Mestechnik & System).
  • the incident angle of the incident light is set to 3 °
  • the distance from the irradiation position on the cover glass of the examples and the comparative examples to the lens is set to 410 mm
  • the cover glasses of the examples and the comparative examples It was measured by sticking it on a blackboard glass with an immersion liquid having a refractive index of 1.53 on the back surface of the lens.
  • the visibility parameter P is in the range of 150 or more and 2000 or less. In particular, in Examples 1 to 6, 8 and 10, it can be seen that the visibility parameter P is in the range of 200 or more and 2000 or less. On the other hand, the visibility parameter P of Comparative Example 1 is higher than 2000, and Comparative Examples 2 to 6 are lower than 150.
  • FIG. 2 is a photograph of the cover glass of Comparative Example 1.
  • FIG. 3 is a photograph of the cover glass of Comparative Example 2.
  • FIG. 4 is a photograph of the cover glass of Example 1.
  • FIG. 5 is a photograph of the cover glass of Example 2.
  • FIG. 6 is a photograph of the cover glass of Example 3.
  • FIG. 7 is a photograph of the cover glass of Example 4.
  • FIG. 8 is a photograph of the cover glass of Example 1 and Comparative Example 2 under sunlight.
  • Comparative Example 1 the visibility is low due to reflection, and in Comparative Example 2, the visibility is low due to the resolution. As shown in FIG. 2, it can be seen that in Comparative Example 1, the degree of reflection of the illumination is large. As shown in FIG. 3, it can be seen that the characters are unclear in Comparative Example 2. Further, as shown in Table 4, in Comparative Examples 3, 4 and 6, the visibility is low in resolution, and in Comparative Example 5, the visibility is low in glare.
  • Example 4 it can be seen that in Examples 1 to 4, the reflection, glare, and resolution are all good. As shown in FIGS. 4 to 7, in Examples 1 to 4, the degree of reflection is not large, the characters are clear, and the glare is not noticeable. Further, as shown in FIG. 8, under sunlight, the characters are almost invisible in Comparative Example 2 and the visibility is low, whereas in the first embodiment, the characters are clearly visible and the visibility is high. As described above, it can be seen that the visibility is high in Examples 1 to 4. Similarly, as shown in Table 4, it can be seen that in Examples 5 to 10, the reflection, glare, and resolution are all good, and the visibility is high.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Surface Treatment Of Glass (AREA)
  • Surface Treatment Of Optical Elements (AREA)

Abstract

L'invention concerne un verre couvre-objet qui est capable d'augmenter efficacement la visibilité. Le verre couvre-objet selon la présente invention comprend une plaque de verre 2, une couche antireflet 3 disposée sur la plaque de verre 2, et un film antireflet 4 disposé sur la couche antireflet 3, et est caractérisé en ce que, en supposant que la clarté d'image est DOI, le brillant est G, le trouble est H, la valeur d'indice de scintillement est S, et la valeur d'indice de réflexion est C, le paramètre de visibilité P dans l'équation (1) est de 150 à 2000. Équation (1) : P = (100000×DOI)/(G×H×S×C)
PCT/JP2020/016268 2019-04-25 2020-04-13 Verre couvre-objet et signalisation numérique WO2020218056A1 (fr)

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JP2009075248A (ja) * 2007-09-19 2009-04-09 Lintec Corp 防眩性ハードコートフィルム及びその製造方法
JP2010020267A (ja) * 2008-06-09 2010-01-28 Sony Corp 光学フィルムおよびその製造方法、防眩性フィルム、光学層付偏光子、ならびに表示装置
JP2013214059A (ja) * 2012-03-06 2013-10-17 Pentel Corp 防眩コート
WO2017038868A1 (fr) * 2015-08-31 2017-03-09 旭硝子株式会社 Structure translucide, procédé pour la fabriquer et article
WO2017135261A1 (fr) * 2016-02-01 2017-08-10 旭硝子株式会社 Structure translucide
JP2018063419A (ja) * 2016-10-07 2018-04-19 旭硝子株式会社 防眩膜付基体、防眩膜形成用液状組成物及び防眩膜付基体の製造方法
WO2018110486A1 (fr) * 2016-12-12 2018-06-21 日本電気硝子株式会社 Article transparent
WO2018140581A1 (fr) * 2017-01-30 2018-08-02 Corning Incorporated Surfaces de verre texturées à faible éclat et leurs procédés de fabrication
WO2018212146A1 (fr) * 2017-05-15 2018-11-22 日本電気硝子株式会社 Produit transparent et procédé de production de produit transparent
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Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004004417A (ja) * 2002-04-18 2004-01-08 Nitto Denko Corp 光拡散性シート、光学素子および画像表示装置
JP2009075248A (ja) * 2007-09-19 2009-04-09 Lintec Corp 防眩性ハードコートフィルム及びその製造方法
JP2010020267A (ja) * 2008-06-09 2010-01-28 Sony Corp 光学フィルムおよびその製造方法、防眩性フィルム、光学層付偏光子、ならびに表示装置
JP2013214059A (ja) * 2012-03-06 2013-10-17 Pentel Corp 防眩コート
WO2017038868A1 (fr) * 2015-08-31 2017-03-09 旭硝子株式会社 Structure translucide, procédé pour la fabriquer et article
WO2017135261A1 (fr) * 2016-02-01 2017-08-10 旭硝子株式会社 Structure translucide
JP2018063419A (ja) * 2016-10-07 2018-04-19 旭硝子株式会社 防眩膜付基体、防眩膜形成用液状組成物及び防眩膜付基体の製造方法
WO2018110486A1 (fr) * 2016-12-12 2018-06-21 日本電気硝子株式会社 Article transparent
WO2018140581A1 (fr) * 2017-01-30 2018-08-02 Corning Incorporated Surfaces de verre texturées à faible éclat et leurs procédés de fabrication
WO2018212146A1 (fr) * 2017-05-15 2018-11-22 日本電気硝子株式会社 Produit transparent et procédé de production de produit transparent
JP2019128600A (ja) * 2018-01-25 2019-08-01 日本電気硝子株式会社 物品

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