WO2008050500A1 - Plaque protectrice pour dispositif d'affichage d'équipement portable - Google Patents

Plaque protectrice pour dispositif d'affichage d'équipement portable Download PDF

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Publication number
WO2008050500A1
WO2008050500A1 PCT/JP2007/057482 JP2007057482W WO2008050500A1 WO 2008050500 A1 WO2008050500 A1 WO 2008050500A1 JP 2007057482 W JP2007057482 W JP 2007057482W WO 2008050500 A1 WO2008050500 A1 WO 2008050500A1
Authority
WO
WIPO (PCT)
Prior art keywords
protective plate
display device
glass
plate
less
Prior art date
Application number
PCT/JP2007/057482
Other languages
English (en)
Japanese (ja)
Inventor
Masahiro Kobayashi
Koichi Hashimoto
Original Assignee
Nippon Electric 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
Priority claimed from JP2006268391A external-priority patent/JP4793756B2/ja
Application filed by Nippon Electric Glass Co., Ltd. filed Critical Nippon Electric Glass Co., Ltd.
Publication of WO2008050500A1 publication Critical patent/WO2008050500A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
    • 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
    • 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 a protective plate for protecting a display device of a portable device from isotropic force.
  • LCD liquid crystal display
  • OELD organic EL display
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-299199
  • Patent Document 2 Japanese Patent Laid-Open No. 2003-140558
  • a protective plate that also has glass power is required to have low transparency and be less susceptible to dirt and scratches.
  • the protective plate itself is becoming increasingly thin for portable devices. It is required to reduce the wall thickness.
  • An object of the present invention is to provide a protective plate for a portable device display device that can sufficiently protect the display even when the wall thickness is reduced.
  • the inventors of the present invention have a particularly large amount of Al 2 O (15 to 30%) in the glass composition.
  • the present invention relates to the following (1) to (6).
  • a protective plate for a portable device display device comprising a plate glass having a Young's modulus of 75 GPa or more.
  • a protective plate for a portable device display device comprising a plate glass containing a composition of 15 to 30%.
  • Sheet glass is in mass%, SiO 50-80%, ⁇ 1 ⁇ 15-30%, ⁇ 1 ⁇ + ⁇
  • the protective plate for a portable device display device which also has a glass strength containing a composition of 2 2 3 2 3 gO + ZnO 15 to 30%.
  • the protective plate for a portable device display device of the present invention includes a plate glass having a Young's modulus of 75 GPa or more, it is difficult to squeeze and break even if it is thin. As a result, since the display can be sufficiently protected even if the wall thickness is reduced, the mobile device itself can be made thinner.
  • the Young's modulus of the plate glass is 75 GPa or more, and preferably 78 GPa or more, more preferably 80 GPa or more.
  • the protective plate for a portable device display device of the present invention is preferably such that the hardness of the plate glass is 500 Hv or more, since the surface is hardly scratched, so that it does not cause breakage and the display is difficult to see. More preferably, it is 600 Hv or more, and further preferably 650 Hv or more.
  • the protective plate for a mobile device display device of the present invention has a thermal expansion coefficient of 30 to 70 10 _7 7 °, preferably 35 to 60 10 _7 7 °, more preferably 40 to 30 in the range of 30 to 380 ° C. 50 X 1 0 _ . C.
  • the thermal expansion coefficient is higher than 70 ⁇ 10 _7 / ° C, the glass substrate is easily damaged by thermal strain when immersed in a molten salt such as potassium nitrate. If the thermal expansion coefficient is smaller than 30 X 10 _7 Z ° C, the thermal expansion coefficient cannot be matched with the surrounding members.
  • the protective plate for a portable device display device of the present invention is preferable because it is damaged when it is strengthened.
  • a sheet glass having a surface compressive stress value of 700 MPa or more is preferred because of its excellent effect of preventing breakage.
  • Methods for strengthening the protective plate include a method of rapidly cooling from a temperature above the strain point (physical strengthening) and an alkali metal ion (for example, Li + or Na +) contained in the protective plate with an alkali having a large ion radius.
  • an alkali metal ion for example, Li + or Na +
  • a method of ion exchange with metal ions for example, K +
  • the method of ion exchange is preferable because it can apply a large compressive stress to break.
  • the protective plate for a portable device display device of the present invention has an antireflection film formed on at least one side (particularly the outer surface side), there is less reflection and images and images on the display device are easy to see. preferable.
  • the transparent conductive film when a transparent conductive film is formed on the protective plate for a portable device display device of the present invention, it is possible to shield electromagnetic waves and to prevent contamination such as dust because it is difficult to be charged.
  • oxides such as tin-containing indium oxide (ITO), antimony-containing indium oxide, and fluorine-containing indium oxide, and metal thin films such as aluminum, gold, and silver can be used.
  • the protective plate for portable device display device of the present invention is formed with a scattering prevention film (scattering prevention film). It is preferable that fragments are hardly scattered even if the plate glass is broken.
  • the anti-scattering film is preferred because it has an excellent effect of preventing debris from being scattered on either side, even if it is formed on either side.
  • the protective plate for a portable device display device of the present invention is expressed by mass%, SiO 50-80%, Al 2 O 3
  • the Young's modulus is large and difficult to stagnate.
  • SiO is a component that forms a skeleton of glass. If it is less than 50%, weather resistance is obtained.
  • the content of 2 is 50 to 80%, preferably 50 to 75%, more preferably 55 to 75%, more preferably 60 to 70%, and still more preferably 62 to 68%.
  • Al O increases the Young's modulus and facilitates ion exchange to strengthen the surface.
  • the content of 2 3 is 15 to 30%, preferably 17 to 28%, more preferably 20 to 25%.
  • Al 2 O, MgO, and ZnO are components that increase the Young's modulus. 15% total content of these ingredients
  • the total amount of ZnO is 15 to 33%, preferably 15 to 30%.
  • MgO is not an essential component, but can be added up to a content of 5%. If it exceeds 5%, devitrification occurs and it is difficult to mold immediately. A content of 4% or less is preferred 3.5
  • ZnO is not an essential component, but can be added up to a content of 5%. If it exceeds 5%, devitrification tends to occur.
  • the content is preferably 4% or less, and more preferably 3.5% or less.
  • Li 2 O is an ion exchange component that improves meltability, increases Young's modulus
  • the content is preferably 5.5% or less, and more preferably 5.2% or less.
  • Na 2 O is also an ion exchange component, improving the meltability and adjusting the thermal expansion coefficient.
  • the content can be added up to 5%. If the content is more than 5%, the Young's modulus may decrease, and when a transparent conductive film such as an ITO film is formed on the glass surface, the transparent conductive film is likely to deteriorate, which is not preferable.
  • the content is preferably 4.5% or less. 4. More preferably, the content is 2% or less.
  • Li O and Na 2 O are components strengthened by ion exchange with K +
  • 0.1% or more is preferable 0.5% or more is more preferable 1% or more is more preferable. If it is less than 1%, it is not preferable because it is difficult to sufficiently strengthen even after ion exchange with K +.
  • K 2 O is a component that enhances the meltability and increases the coefficient of thermal expansion.
  • the content is more than 5%, the Young's modulus may decrease, which is not preferable.
  • the content is preferably 4.5% or less. 4. More preferably, the content is 2% or less.
  • the total amount of Li 0, Na 2 O and ⁇ ⁇ is 0-10%. The total amount of these becomes 10% or more
  • the range of the total amount of 2 2 and K ⁇ is 0 to 8%, more preferably 0.1 to 8%,
  • a preferred range is 0.5 to 8%, and a particularly preferred range is 1 to 7%.
  • CaO, SrO, and BaO are also components that increase the meltability and easily cause force devitrification. Therefore, these components can be added up to 8% in total. 7% or less 6. It is more preferable that it is 6.5% or less.
  • TiO is a component that lowers the glass viscosity at high temperatures and imparts weather resistance
  • ZrO is a component that imparts weather resistance, but is easily devitrified and difficult to melt
  • PO is a component that suppresses the occurrence of devitrification, and is easy to phase-separate!
  • Sb 2 O, Sb 2 O, SO, Cl, F may be added up to 2% each as a clarifier.
  • the total content is more preferably 0.7% or less, and even more preferably 0.5% or less.
  • Table 1 shows the glass composition and properties of each sample
  • Table 2 shows the amount of stagnation of each sample
  • Table 3 shows the properties before and after chemical strengthening.
  • Example 1 Example 2 Comparative example 1 Comparative example 2 Material Glass Glass Glass Acrylic
  • Example 1 Example 2 Comparative example 1 Comparative example 2 Substrate size Deflection amount (mm) Deflection amount (mm) Manipulation amount (mm) Deflection amount (mm)
  • glass raw materials were prepared so as to have the composition shown in Table 1, and then charged into a platinum crucible.
  • the molten glass was obtained using an electric furnace at 1600 ° C for 5 hours.
  • the molten glass was poured onto a carbon plate, and a glass plate having a thickness of 1.2 mm was produced using a roller.
  • the Young's modulus was measured by a resonance method by preparing a sample of 20 X 40 X 1 mm.
  • the measuring device used was a nondestructive elastic modulus measuring system (Kanebo KI-11).
  • the hardness was measured 10 times using a micro hardness tester (MXT-50 manufactured by Matsuzawa Seiki Co., Ltd.), and the average was calculated.
  • the average transmittance was 40 x 40 x 0.7 mm, and the transmittance at each wavelength of 400 to 700 nm was measured using a spectrophotometer (Shimadzu UV-3100PC) with a slit width of 2n. Measured in m and averaged.
  • the density was measured by the well-known Archimedes method.
  • the thermal expansion coefficient was measured using a dilatometer, and the average thermal expansion coefficient at 30 to 380 ° C was used.
  • each sample shown in Table 2 was prepared and arranged on a frame in which each side of the sample was supported with a width of lmm.
  • an ION load was measured in a direction perpendicular to the sample surface with a rod having a square cross section of 10 mm x 10 mm in the center of the sample, and the amount of displacement at the center was measured as the amount of stagnation.
  • the immersed sample was placed on a smooth ring with an inner diameter of 25 mm, and a load was applied to the center of the sample using a flat indenter with a diameter of 12.5 mm until it was damaged.
  • a load was applied to the center of the sample using a flat indenter with a diameter of 12.5 mm until it was damaged.
  • Example 1 As is clear from Table 1, the Young's modulus of Example 1 was 81 GPa, the Young's modulus of Example 2 was 82 GPa, and Comparative Example 1 was 70 GPa.
  • Example 1 and Example 2 after strengthening had higher average fracture strength than Comparative Example 1 after strengthening.
  • Example 1 and Comparative Example 1 a 35 ⁇ 35 ⁇ 0.5 mm plate-like sample was immersed in molten potassium nitrate set at 500 ° C. All the end surfaces of these plate samples were polished with # 600 water-resistant abrasive paper, and both surfaces were optically polished. In addition, the time until one plate-like sample was completely immersed in potassium nitrate molten salt was within 1 second, and the number of damaged plate samples for Example 1 and Comparative Example 1 was examined. As a result, in Example 1, the number of damaged sheets was 0 out of 50 sheets, whereas in Comparative Example 1, the number of damaged sheets was 5 out of 50 sheets. there were.
  • the protective plate for a portable device display device of the present invention can be used as a protective plate for displays such as portable game machines, portable music players, IC recorders, electronic dictionaries, etc., which can be used only with a mobile phone, a digital camera, or a PDA. is there.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Glass Compositions (AREA)

Abstract

L'invention concerne une plaque protectrice pour dispositif d'affichage d'équipement portable, caractérisée en ce qu'elle comprend une vitre plate présentant un module de Young au moins égal à 75 GPa. En outre, la plaque protectrice pour dispositif d'affichage d'équipement portable est caractérisée en ce qu'elle comprend une vitre plate dont la composition comprend, en masse, 50 à 80% de SiO2, 15 à 30% d'Al2O3 et 15 à 30% d'Al2O3 + MgO + ZnO. La plaque protectrice pour dispositif d'affichage d'équipement portable peut être utilisée comme plaque protectrice pour affichages de téléphones cellulaires, appareils photo numériques et PDA, ainsi que pour les affichages, par exemple, de consoles de jeu portables, de lecteurs de musique portables, d'enregistreurs à C.I. et de dictionnaires électroniques.
PCT/JP2007/057482 2006-09-29 2007-04-03 Plaque protectrice pour dispositif d'affichage d'équipement portable WO2008050500A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-268391 2006-09-29
JP2006268391A JP4793756B2 (ja) 2005-10-03 2006-09-29 携帯機器表示装置用保護板

Publications (1)

Publication Number Publication Date
WO2008050500A1 true WO2008050500A1 (fr) 2008-05-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/057482 WO2008050500A1 (fr) 2006-09-29 2007-04-03 Plaque protectrice pour dispositif d'affichage d'équipement portable

Country Status (1)

Country Link
WO (1) WO2008050500A1 (fr)

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Publication number Priority date Publication date Assignee Title
FR2988089A1 (fr) * 2012-03-15 2013-09-20 Saint Gobain Feuille de verre
US8551898B2 (en) 2011-10-25 2013-10-08 Corning Incorporated Glass compositions with improved chemical and mechanical durability
WO2014044985A1 (fr) * 2012-09-21 2014-03-27 Saint-Gobain Glass France Feuille de verre et dispositif comprenant ladite feuille de verre
US9034442B2 (en) 2012-11-30 2015-05-19 Corning Incorporated Strengthened borosilicate glass containers with improved damage tolerance
US9145329B2 (en) 2011-10-25 2015-09-29 Corning Incorporated Alkaline earth alumino-silicate glass compositions with improved chemical and mechanical durability
US9186295B2 (en) 2011-10-25 2015-11-17 Corning Incorporated Delamination resistant pharmaceutical glass containers containing active pharmaceutical ingredients
JP2016506537A (ja) * 2012-12-10 2016-03-03 ジーティーエイティー コーポレーションＧｔａｔ Ｃｏｒｐｏｒａｔｉｏｎ 多層サファイアカバープレートを含有してなる携帯用電子機器
US9428302B2 (en) 2012-06-28 2016-08-30 Corning Incorporated Delamination resistant glass containers with heat-tolerant coatings
US9517966B2 (en) 2011-10-25 2016-12-13 Corning Incorporated Glass compositions with improved chemical and mechanical durability
US9603775B2 (en) 2013-04-24 2017-03-28 Corning Incorporated Delamination resistant pharmaceutical glass containers containing active pharmaceutical ingredients
US9668936B2 (en) 2012-02-28 2017-06-06 Corning Incorporated Glass articles with low-friction coatings
US9700486B2 (en) 2013-04-24 2017-07-11 Corning Incorporated Delamination resistant pharmaceutical glass containers containing active pharmaceutical ingredients
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US9707155B2 (en) 2013-04-24 2017-07-18 Corning Incorporated Delamination resistant pharmaceutical glass containers containing active pharmaceutical ingredients
US9713572B2 (en) 2013-04-24 2017-07-25 Corning Incorporated Delamination resistant pharmaceutical glass containers containing active pharmaceutical ingredients
US9717649B2 (en) 2013-04-24 2017-08-01 Corning Incorporated Delamination resistant pharmaceutical glass containers containing active pharmaceutical ingredients
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US9849066B2 (en) 2013-04-24 2017-12-26 Corning Incorporated Delamination resistant pharmaceutical glass containers containing active pharmaceutical ingredients
US10065884B2 (en) 2014-11-26 2018-09-04 Corning Incorporated Methods for producing strengthened and durable glass containers
US10117806B2 (en) 2012-11-30 2018-11-06 Corning Incorporated Strengthened glass containers resistant to delamination and damage
US10350139B2 (en) 2011-10-25 2019-07-16 Corning Incorporated Pharmaceutical glass packaging assuring pharmaceutical sterility
US10737973B2 (en) 2012-02-28 2020-08-11 Corning Incorporated Pharmaceutical glass coating for achieving particle reduction
US10899659B2 (en) 2014-09-05 2021-01-26 Corning Incorporated Glass articles and methods for improving the reliability of glass articles
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JPS60122748A (ja) * 1983-12-06 1985-07-01 Nippon Sheet Glass Co Ltd アルミノシリケ−トガラス
JPH01239036A (ja) * 1988-03-16 1989-09-25 F G K:Kk 高強度ガラス
JPH0848537A (ja) * 1994-08-05 1996-02-20 Nippon Sheet Glass Co Ltd 化学強化用ガラス
JPH11302033A (ja) * 1998-04-17 1999-11-02 Nippon Sheet Glass Co Ltd ガラス組成物およびその製造方法
JP2001180969A (ja) * 1999-12-28 2001-07-03 Central Glass Co Ltd リチウム含有高ヤング率ガラスおよびガラス物品
JP2001348245A (ja) * 2000-06-02 2001-12-18 Hoya Corp 強化ガラス、その製造方法およびディスプレイ用ガラス
JP2002174810A (ja) * 2000-12-08 2002-06-21 Hoya Corp ディスプレイ用ガラス基板及びその製造方法並びにこれを用いたディスプレイ
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