WO2016027812A1 - 車載表示装置 - Google Patents

車載表示装置 Download PDF

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Publication number
WO2016027812A1
WO2016027812A1 PCT/JP2015/073154 JP2015073154W WO2016027812A1 WO 2016027812 A1 WO2016027812 A1 WO 2016027812A1 JP 2015073154 W JP2015073154 W JP 2015073154W WO 2016027812 A1 WO2016027812 A1 WO 2016027812A1
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WO
WIPO (PCT)
Prior art keywords
cover glass
layer
display device
display panel
thickness
Prior art date
Application number
PCT/JP2015/073154
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English (en)
French (fr)
Japanese (ja)
Inventor
井上　淳
山本　功
匡平 橋本
保真 加藤
寧司 深澤
裕介 小林
Original Assignee
旭硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 旭硝子株式会社 filed Critical 旭硝子株式会社
Priority to CN201580045923.1A priority Critical patent/CN106604902B/zh
Priority to KR1020167033081A priority patent/KR20170048249A/ko
Priority to DE112015003842.6T priority patent/DE112015003842B4/de
Priority to JP2016544220A priority patent/JP6418241B2/ja
Publication of WO2016027812A1 publication Critical patent/WO2016027812A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10128—Treatment of at least one glass sheet
    • B32B17/10137—Chemical strengthening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10366—Reinforcements of the laminated safety glass or glazing against impact or intrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • C03C21/007—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in gaseous phase
    • 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 
    • G02F1/011—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  in optical waveguides, not otherwise provided for in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness

Definitions

  • the present invention relates to an on-vehicle display device.
  • Patent Document 1 describes a transparent surface material with an adhesive layer having an adhesive layer formed on the surface.
  • a vehicle-mounted display device such as a car navigation device is mounted on a vehicle such as an automobile.
  • Examples of the type of the in-vehicle display device include an on-dash type standing outside the dashboard, an in-dash type embedded in the dashboard, and the like.
  • a transparent protective member such as a film or glass is used from the viewpoint of protecting the display panel.
  • a protective member made of glass (cover glass) instead of a film is used from the viewpoint of texture. Is desired.
  • laminated glass tends to be thick and easily causes design problems. Further, since the cost is high, use of tempered glass is required.
  • the in-vehicle display device cover glass is required to have excellent impact resistance so that it does not break even if a passenger's head hits when a vehicle collision accident occurs.
  • high impact resistance is required for the cover glass.
  • the present invention has been made in view of the above points, and an object thereof is to provide an on-vehicle display device having excellent impact resistance of a cover glass.
  • An in-vehicle display device is an in-vehicle display device configured by stacking members up to the n-th layer using a surface cover glass as a first layer, and the cover glass has a plate thickness.
  • the tempered glass is 0.5 to 2.5 mm and the thickness of the surface compressive stress layer is 10 ⁇ m or more, and the in-vehicle display device is an in-vehicle display device that satisfies the following formula (I).
  • E 1 Young's modulus of the cover glass (unit: GPa)
  • t 1 thickness of the cover glass (Unit: mm)
  • E n Young's modulus (unit: GPa) of the n-th layer member
  • t n n-th layer thickness (unit: mm)
  • n is an integer of 2 or more.
  • FIG. 5 is a sectional view taken along line AA in FIG. 4. It is a top view which shows a test body. It is the graph which plotted the evaluation result of impact resistance.
  • FIG. 1 is a schematic cross-sectional view showing a cover glass with an adhesive layer.
  • a cover glass with an adhesive layer is manufactured and bonded to a display panel.
  • the method for manufacturing the in-vehicle display device is not limited thereto.
  • the cover glass and the display panel may be bonded via an OCA (Optically Clear Adhesive) film or the like.
  • a cover glass 10 with an adhesive layer shown in FIG. 1 includes a transparent cover glass 12, an adhesive layer 14, a protective film 16, and a light shielding part 20.
  • the adhesive layer 14 is provided on the cover glass 12.
  • the cover glass 12 has a light shielding portion 20 formed at the peripheral edge 12 b, and an adhesive layer 14 is formed on the first main surface 12 c of the cover glass 12.
  • the shape of the cover glass 12 and the adhesive layer 14 is, for example, a rectangular shape in plan view, and the adhesive layer 14 has a smaller outer shape.
  • the adhesive layer 14 is disposed with its center aligned with the cover glass 12.
  • the light shielding unit 20 is configured to conceal wiring members connected to the display panel other than the display surface (display area) of the display panel, which will be described later, from being visible from the second main surface 12d side of the cover glass 12. .
  • the light shielding portion 20 is not necessarily provided.
  • a protective film 16 covering the entire surface of the cover glass 12 is detachably provided on the first main surface 14a of the adhesive layer 14.
  • the protective film 16 is peeled off. In this case, for example, a cut is made in the first main surface 16a of the protective film 16, and the protective film 16 is peeled off.
  • the protective film 16 is not particularly limited, and for example, a relatively flexible film such as polyethylene or polypropylene is used.
  • the cover glass 12 protects the display surface (display region) of the in-vehicle display device, and is usually a plate-like body (glass plate) having a flat shape or a curved surface.
  • the cover glass 12 has a thickness of 0.5 to 2.5 mm. If the plate thickness is less than 0.5 mm, the strength of the cover glass 12 itself is insufficient, and the impact resistance of the cover glass 10 with the adhesive layer may be reduced. On the other hand, if the plate thickness exceeds 2.5 mm, the plate becomes too thick, and is unsuitable for use in an in-vehicle display device from the viewpoint of design.
  • the outer shape and size of the cover glass 12 are larger than those of the display panel from the viewpoint of design, sensor attachment, and attachment to the display module.
  • the shape of the cover glass 12 determines suitably according to a vehicle-mounted display apparatus on a design.
  • various in-vehicle display devices such as a rectangle and a trapezoid.
  • the outer shape of the cover glass 12 is often equivalent to the outer shape of the in-vehicle display device.
  • a cover glass 12 that covers the entire display surface of the display panel and that includes a curve in the outer shape can also be used.
  • the size of the cover glass 12 for example, in the case of a rectangle, the longitudinal direction: 100 to 800 mm and the short side direction: 40 to 300 mm can be mentioned.
  • the cover glass 12 for example, a colorless and transparent plate-like tempered glass in which soda lime glass or aluminosilicate glass (SiO 2 —Al 2 O 3 —Na 2 O glass) is tempered.
  • soda lime glass or aluminosilicate glass SiO 2 —Al 2 O 3 —Na 2 O glass
  • chemically tempered glass for example, “Dragon Trail (registered trademark)” manufactured by Asahi Glass Co., Ltd.
  • the glass material constituting the cover glass 12 is, for example, in mol%, SiO 2 50 to 80%, Al 2 O 3 1 to 20%, Na 2 O 6 to 20%, K 2 O.
  • a compressive stress layer is formed on both sides thereof, and the thickness of the surface compressive stress layer is 10 ⁇ m or more, preferably 15 ⁇ m or more, more preferably 25 ⁇ m or more, More preferably, it is 30 ⁇ m or more. Further, the surface compressive stress in the surface compressive stress layer is preferably 650 MPa or more, and more preferably 750 MPa or more.
  • the method of subjecting the cover glass 12 to chemical strengthening includes a method in which the cover glass 12 is immersed in KNO 3 molten salt, subjected to ion exchange treatment, and then cooled to around room temperature.
  • the processing conditions such as the temperature and immersion time of the KNO 3 molten salt may be set so that the surface compressive stress and the thickness of the surface compressive stress layer have desired values.
  • the adhesive layer 14 is for bonding the cover glass 12 to the in-vehicle display device when the cover glass 12 is bonded to the in-vehicle display device.
  • the adhesive layer 14 is transparent like the cover glass 12, and the refractive index difference between the cover glass 12 and the adhesive layer 14 is preferably small.
  • the adhesive layer 14 include a layer made of a transparent resin obtained by curing a liquid curable resin composition.
  • a curable resin composition a photocurable resin composition, a thermosetting resin composition, etc. are mentioned, for example, Especially, the photocurable resin composition containing a curable compound and a photoinitiator is preferable.
  • the photocurable resin composition for layered part formation of patent document 1 is mentioned suitably, for example.
  • the adhesive layer 14 may be bonded to OCA or the like separately cured in a film shape on the cover glass 12.
  • the thickness of the pressure-sensitive adhesive layer 14 is, for example, preferably 5 to 400 ⁇ m, and more preferably 50 to 200 ⁇ m. Further, the storage shear modulus of the adhesive layer 14 at a temperature of 25 ° C. is preferably, for example, 5 kPa to 5 MPa, and more preferably 1 MPa to 30 MPa.
  • a film material (not shown) is attached to the surface of the curable resin composition film.
  • the film material is cut to become the protective film 16 as described later.
  • the curable resin composition film was protected by the film material by curing the curable resin composition film by photocuring treatment or thermosetting treatment.
  • a laminate is obtained.
  • the position which becomes the side surface 14b of the adhesion layer 14 is set as a cutting line, and the laminated body is cut by the cutting line using a laser beam.
  • the cover glass 10 with the adhesion layer by which the protective film 16 was provided in the 1st main surface 14a of the adhesion layer 14 is obtained.
  • a cutting process may be abbreviate
  • FIG. 2 is a schematic cross-sectional view showing the in-vehicle display device 100.
  • the in-vehicle display device 100 has a concave housing 106.
  • a backlight unit 102 is placed on a housing bottom member 107 that is a bottom plate of the housing 106, and a display panel 104 is placed on the backlight unit 102.
  • the backlight unit 102 and the display panel 104 are housed in the housing 106.
  • An opening 108 is formed in the housing 106, and the display panel 104 is disposed on the opening 108 side.
  • a region corresponding to the opening 108 of the display panel 104 is a display surface 104a.
  • the display panel module 100a is configured with the backlight 102 and the display panel 104 as main components.
  • the backlight unit 102 is generally composed of a lens sheet, a diffusion sheet, a light guide plate, a lamp, a reflector, and the like.
  • the light guide plate is the thickest of these, and the overall rigidity of the backlight unit is increased. It is the main component in deciding.
  • the thickness of the light guide plate is preferably 10 mm or less, more preferably 7 mm or less, and even more preferably 5 mm or less. This is to achieve a thinner casing by narrowing the frame.
  • the thickness of the light guide plate is preferably 1 mm or more, more preferably 2 mm or more, and further preferably 4 mm or more. This is to prevent the light guide plate from being damaged by bending stress when an impact is applied to the backlight unit.
  • the Young's modulus of the material forming the light guide plate is preferably 1 GPa or more, more preferably 2 GPa or more, further preferably 3 GPa or more, and particularly preferably 60 GPa or more. This is to improve the impact resistance of the cover glass.
  • the linear expansion coefficient of the material forming the light guide plate is preferably 800 ⁇ 10 ⁇ 7 / ° C. or less, more preferably 600 ⁇ 10 ⁇ 7 / ° C. or less, and further preferably 200 ⁇ 10 ⁇ 7 / ° C. or less. This is to suppress the rise in the temperature inside the vehicle and the thermal expansion of the light guide plate by the light source in the backlight unit, and to achieve a thinner casing by narrowing the frame.
  • the minimum value of the internal transmittance in the wavelength range of 400 to 700 nm is 80% or more under the condition of the optical path length of 50 mm, and the maximum value and the minimum value of the internal transmittance are The difference is preferably 15% or less.
  • the minimum value of the internal transmittance is 85% or more, and the difference between the maximum value and the minimum value of the internal transmittance is more preferably 13% or less.
  • the minimum value of the internal transmittance is 90% or more, More preferably, the difference between the maximum value and the minimum value of the internal transmittance is 8% or less.
  • the material for forming the light guide plate is not particularly limited as long as it satisfies the above-described conditions and the completed in-vehicle display device 100 satisfies the formula (I) described later.
  • the material for forming the light guide plate is specifically acrylic resin, polycarbonate, glass or the like, and glass is particularly preferable. This is because of excellent Young's modulus, high strength of the casing and backlight unit, low expansion due to heat and moisture, and excellent thickness reduction of the casing.
  • the glass may be tempered, and the tempering method may be chemical or physical, but is preferably chemically tempered. Moreover, it is preferable that the end surface of glass is chamfered. It is further desirable to chemically strengthen after chamfering. This is to prevent cracking from the end surface portion of the light guide plate due to vibration of the vehicle display device.
  • the configuration of the display panel 104 and the material of the housing 106 are not particularly limited as long as the in-vehicle display device 100 satisfies the formula (I) described later.
  • the shape and size of the outer shape of the casing bottom member 107 are appropriately determined according to the outer shape of the in-vehicle display device 100.
  • the in-vehicle display device 100 has recently been thinned in terms of design as well as the display panel module 100a. Therefore, since the outer shape of the display panel 104 is generally a rectangle such as a rectangle, in that case, the outer shape of the casing bottom member 107 is preferably a rectangle.
  • the size of the casing bottom member 107 in a plan view is that when the boundary portion between the cover glass 12 and the display panel 104 is referred to as a CG back surface step portion 300, the CG back surface step portion 300 is viewed from the back surface. It is preferable to bond the bottom body member 107 to the lower part so as to cover all. This is to show excellent impact resistance in the head impact test described later.
  • the size of the casing bottom member 107 is more preferably the same as or larger than that of the cover glass 12. When the non-display area from the display panel end to the cover glass end is wide, it is preferable to bond the casing bottom member 107 to the lower part so as to cover the CG back surface step portion 300.
  • one or more other plate-like members may be bonded to the lower surface side of the housing bottom member 107, for example.
  • the plate-like member is also preferably bonded to the lower part so as to cover all the CG back surface level difference portion 300 when viewed from the back surface in a vertical direction. This is also because it shows excellent impact resistance in the head impact test described later. More preferably, the size of the plate-like member is the same as or larger than that of the cover glass 12.
  • the cover glass 10 with the adhesive layer bonds the adhesive layer 14 to the display surface 104 a of the display panel 104 so as to fill the opening 108 of the housing 106.
  • the cover glass 12 covers the display surface 104 a of the in-vehicle display device 100 to the end surface 106 a of the housing 106.
  • This cover glass 12 functions as a protective member for the display surface 104 a of the in-vehicle display device 100.
  • the vehicle-mounted display device of the present invention has a configuration in which the cover glass is the first layer and the first layer to the n-th layer are laminated.
  • the cover glass 12 first layer
  • the display panel 104 second layer
  • the backlight unit 102 third layer
  • the housing fourth layer
  • the body bottom member 107 has a configuration in which four layers are stacked in this order.
  • the in-vehicle display device does not have a backlight unit, and at least three layers of a cover glass (first layer), a display panel (second layer), and a housing bottom member (third layer) are arranged in this order. It may have a laminated structure.
  • the cover glass is used as a first layer member (that is, a first layer member on the surface on the display surface side), and one type or a plurality of types from the layer next to the first layer.
  • the members are placed in order so as to be laminated, and have a laminated structure.
  • the lamination is a form in which the constituent members are sequentially assembled in that order, or are sequentially assembled in that order.
  • Each component does not need to be bonded and stacked, and may be partially or entirely stacked at intervals, and partially surrounded. Or the structure which overlaps may be sufficient and the form of the laminated structure of various variations is included.
  • the cover glass is required to have excellent impact resistance that does not break even if the head of an occupant collides with the vehicle in the event of a vehicle collision.
  • the present inventors have found that the impact resistance of the cover glass is excellent when the in-vehicle display device having the above configuration satisfies the following formula (I).
  • the P is expressed as follows.
  • E 1 Young's modulus of cover glass (unit: GPa) t 1 : thickness of cover glass (unit: mm)
  • E 2 Young's modulus of display panel (unit: GPa) t 2 : thickness of display panel (unit: mm)
  • E 3 Young's modulus of the backlight unit (unit: GPa) t 3 : thickness of the backlight unit (unit: mm)
  • E 4 Young's modulus of casing bottom member (unit: GPa) t 4 : thickness of the casing bottom member (unit: mm) It is.
  • the backlight unit has a structure in which a light guide plate made of a thick glass plate, a polycarbonate plate, an acrylic resin, etc., and several thin functional films such as a reflective polarizing film and a brightness enhancement film are laminated.
  • the Young's modulus of the light guide plate is calculated as the Young's modulus of the backlight unit.
  • the Young's modulus (E 1 ) of the cover glass is preferably 60 to 80 GPa, more preferably 70 to 80 GPa.
  • the Young's modulus (E 2 ) of the display panel is preferably 60 to 80 GPa, more preferably 70 to 80 GPa.
  • the Young's modulus (E 3 ) of the backlight unit is preferably 1 to 90 GPa, more preferably 2 to 90 GPa, and further preferably 60 to 90 GPa.
  • the Young's modulus (E 4 ) of the casing bottom member is preferably 40 to 250 GPa, more preferably 150 to 250 GPa.
  • the display panel, the backlight unit, and the housing may be a composite material formed by combining a plurality of materials. In that case, the Young's modulus of the entire composite material is preferably within the above numerical range.
  • the Young's modulus of each member is measured by a tensile test (JIS K7161 and JIS K7113).
  • the cover glass has a thickness (t 1 ) of 0.5 to 2.5 mm, preferably 0.7 to 2 mm, and more preferably 1.3 to 2 mm.
  • the thickness (t 2 ) of the display panel is preferably 1 to 2 mm, more preferably 1.1 to 1.3 mm.
  • the thickness (t 3 ) of the backlight unit is preferably 1 to 10 mm, more preferably 2 to 6 mm, and further preferably 3 to 5 mm.
  • the thickness (t 4 ) of the housing bottom member is preferably 0.5 to 4 mm, and more preferably 1 to 4 mm.
  • the thickness of each member is the length in the vertical direction in FIG.
  • At least one of the members from the cover glass (first layer) to the nth layer is an adhesive layer.
  • the adhesive layer 14 (referred to as the 1.5th layer) is disposed between the cover glass 12 (first layer) and the display panel 104 (second layer).
  • E 1.5 Young's modulus
  • t 1.5 thickness of the pressure-sensitive adhesive layer
  • the Young's modulus (E 1.5 ) of the adhesive layer is sufficiently smaller than the Young's modulus of the other layers, and the thickness (t 1.5 ) is, for example, 5 to 400 ⁇ m.
  • the value of “E 1.5 t 1.5 2 ” in P is negligibly small compared to the other values of “E 1 t 1 2 ” to “E 4 t 4 2 ”. Therefore, even when the adhesive layer is present in the laminated structure (the first layer to the nth layer), in the present embodiment, when considering the formula (I), it is considered that the adhesive layer is not present. Be good. In other words, the P value may be obtained assuming that the value of “E 1.5 t 1.5 2 ” is 0 (zero).
  • the stress generated on the back surface of the cover glass as the first layer is:
  • the lower one is preferable.
  • sigma 1 of formula (4) is small, high Young's modulus of each member constituting the layer, also, as the thick layer, sigma 1 is can be seen that small. From the equation (6), it can be seen that the cross-sectional second moment has a correlation with the cube of the cover glass thickness, but from the equation (4), the back surface position (y) of the first layer, that is, the thickness is multiplied.
  • P E 1 / (E 1 t 1 2 + E 2 t 2 2 + E 3 t 3 2 + E 4 t 4 2 )
  • the display panel is a liquid crystal panel, an organic EL panel, a PDP, an electronic ink type panel, or the like, and may have a touch panel or the like.
  • a display panel other than the liquid crystal panel for example, in the case of an organic EL panel or a PDP, the calculation is performed with the configuration excluding the backlight unit.
  • Examples of such an in-vehicle display device include an on-dash type car navigation device standing on a dashboard, an in-dash type car navigation device embedded in a dashboard of a vehicle, and the like. Other devices (for example, an instrument panel) may be used.
  • Tempered glass obtained by chemically strengthening aluminosilicate glass as cover glass (trade name “Dragon Trail” (registered trademark) manufactured by Asahi Glass Co., Ltd., compressive stress layer thickness: 38 ⁇ m, surface compressive stress in compressive stress layer: 774 MPa) Prepared.
  • test body 200 was produced.
  • the test body 200 will be described with reference to FIGS.
  • FIG. 4 is a perspective view showing a test body.
  • FIG. 5 is a cross-sectional view taken along line AA in FIG.
  • FIG. 6 is a plan view showing the specimen.
  • the test body 200 is assumed to be an on-dash type on-vehicle display device 100.
  • the in-vehicle display device 100 includes a casing bottom member 107 that is a thin plate, and four casing frames 109 with ribs inside are arranged on the peripheral portion of the casing bottom member 107.
  • the casing bottom member 107 and the four casing frames 109 form a casing 106 having a rectangular recess in the center region.
  • the backlight unit 102 and the display panel 104 are the main constituent members in the recess.
  • a display panel module 100a is arranged.
  • An end portion on the upper surface side of the backlight unit 102 is bonded to an end portion on the lower surface side of the display panel 104 by a double-sided tape 207 or the like. Therefore, an air gap exists between the display panel 104 and the backlight unit 102 by the thickness of the double-sided tape 207 or the like.
  • the distance due to the air gap is 0.5 to 1.5 mm from the backlight unit 102 to the display panel. In general, the air gap is set to 1.5 mm, but it is not necessary to be 1.5 mm depending on the situation, and there may be no air gap. This air gap is controlled by the thickness of an adhesive member such as the double-sided tape 207, and may not be used depending on the situation.
  • the upper surface of the display panel 104 is lower than the upper surface of the housing frame 109 disposed around the display panel 104 and is a recess.
  • the adhesive layer 14 of the cover glass 10 with the adhesive layer is bonded to the upper surface of the display panel 104 so as to fill the concave portion.
  • a boundary portion between the cover glass 12 and the display panel 104 is a CG back surface step portion 300.
  • a housing end frame 110 is disposed outside the side end surface of the cover glass 12 and on the top surface of the housing frame 109.
  • Such an in-vehicle display device 100 is fixed to a solid fixing rib 213 integrated with a support plate 215 which is a flat plate by bolts 211 arranged in a gap in one housing frame 109.
  • the housing bottom member 107 is bonded to the lower part so as to cover the entire CG back surface level difference portion 300 when viewed vertically from the back surface. Further, the distance from the CG back surface step portion 300 as shown in FIG. 5 to the outer periphery of the in-vehicle display device 100 and L 2, when the L 1 and L 2/2, housing bottom member 107 in FIGS. 5 (a) one end than the cross-sectional view dimensions of the display panel 104 as shown is used as the L 1 or larger size (one side ie housing bottom member 107, 2L 1 or greater than one side of the display panel 104), CG backside step It is preferable to cover all of the portion 300.
  • one end than the cross-sectional view dimensions of the display panel 104 is used as a large size by L 1 or L 2 or less, it is more preferable to cover all CG backside stepped portion 300.
  • the 5 end than the cross-sectional view dimensions of the display panel 104 as shown in (b) is (equal to the size of the That plan view when viewed vehicle display device 100 from the vertical), using those larger size by L 2, CG backside More preferably, the entire step portion 300 is covered. This is because the effect of reducing the tensile stress in the CG back surface level difference portion 300 can be most expected during the head impact test.
  • the housing 106 may have a structure in which the housing frame 109, the housing bottom member 107, and the housing end frame 110 are separated from each other, may be an integrated molded product, or may have a partially integrated structure, There is no particular limitation.
  • the cover glass 12, the display panel 104, the backlight unit 102, and the housing bottom member 107 are changed in each example, and the Young's modulus and thickness are shown in Table 1 and Table 2 below. It was changed as follows.
  • soda lime glass was substituted for the display panel 104, and a polycarbonate plate was substituted for the backlight unit 102.
  • a polycarbonate plate was substituted for the backlight unit 102.
  • an aluminum plate Youngng's modulus: 68.6 GPa
  • an iron plate Young's modulus: 206 GPa
  • the structure is basically composed of a polarizing plate / glass substrate (for example, a plate thickness of 0.55 mm) / liquid crystal layer / glass substrate (for example, 0.55 mm). Plate thickness) / polarizing plate, but since the polarizing plate and the liquid crystal layer have low rigidity, the glass plate of the liquid crystal panel dominates the rigidity. Therefore, calculation was performed by substituting the Young's modulus of the glass substrate constituting the liquid crystal panel.
  • H 1 to H 3 and W 1 to W 3 are H 1 : 120 mm, H 2 : 150 mm, H 3 : 250 mm, W 1 : 173 mm, W 2 : 250 mm, W 3 :
  • the size of the casing bottom member 107 was set to 160 mm ⁇ 260 mm larger than the display panel 104.
  • other parts were as follows.
  • Adhesive layer 14 thickness: 175 ⁇ m, length: 120 mm, width: 173 mm, storage shear modulus: 8 kPa, -Double-sided tape 207 ...
  • the collision position P (see FIG. 6) on the cover glass 12 that causes the rigid model to collide is a position that is closer to the side opposite to the fixed rib 213 side than the center of the display panel module 100a when the test body 200 is viewed from above. It was. More specifically, the collision position P is not on the housing frame 109 but on the display panel 104 and is a position 10 mm inside from the end of the display panel 104.
  • the vehicle-mounted display apparatus excellent in the impact resistance of a cover glass can be obtained, and it is useful as a vehicle-mounted display apparatus mounted in vehicles, such as a motor vehicle. It should be noted that the entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2014-169322 filed on August 22, 2014 are incorporated herein by reference. .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Surface Treatment Of Glass (AREA)
  • Instrument Panels (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Electroluminescent Light Sources (AREA)
  • Glass Compositions (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Theoretical Computer Science (AREA)
PCT/JP2015/073154 2014-08-22 2015-08-18 車載表示装置 WO2016027812A1 (ja)

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CN201580045923.1A CN106604902B (zh) 2014-08-22 2015-08-18 车载显示装置
KR1020167033081A KR20170048249A (ko) 2014-08-22 2015-08-18 차재 표시 장치
DE112015003842.6T DE112015003842B4 (de) 2014-08-22 2015-08-18 Bordinterne Anzeigevorrichtung
JP2016544220A JP6418241B2 (ja) 2014-08-22 2015-08-18 車載表示装置

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JP2014-169322 2014-08-22

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WO2023080129A1 (ja) 2021-11-04 2023-05-11 Ａｇｃ株式会社 表示装置
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JPWO2021044877A1 (ko) * 2019-09-03 2021-03-11
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JP2018022034A (ja) * 2016-08-03 2018-02-08 旭硝子株式会社 カバー部材および表示装置
JP2020526431A (ja) * 2017-07-07 2020-08-31 コーニング インコーポレイテッド 湾曲したカバーガラスとディスプレイまたはタッチパネルを有する乗り物内装システムおよびその形成方法
US11919396B2 (en) 2017-09-13 2024-03-05 Corning Incorporated Curved vehicle displays
CN109597233A (zh) * 2017-10-02 2019-04-09 Ａｇｃ株式会社 透明基体和显示装置
CN109597233B (zh) * 2017-10-02 2023-04-18 Ａｇｃ株式会社 透明基体和显示装置
CN110497665A (zh) * 2018-05-17 2019-11-26 Ａｇｃ株式会社 层叠体及显示装置
CN110497665B (zh) * 2018-05-17 2023-09-22 Ａｇｃ株式会社 层叠体及显示装置
WO2020255926A1 (ja) 2019-06-19 2020-12-24 Ａｇｃ株式会社 ガラス基体
WO2022215687A1 (ja) 2021-04-09 2022-10-13 Ａｇｃ株式会社 車載表示装置
WO2023032934A1 (ja) * 2021-08-30 2023-03-09 Ａｇｃ株式会社 表示装置
WO2023080129A1 (ja) 2021-11-04 2023-05-11 Ａｇｃ株式会社 表示装置
RU219308U1 (ru) * 2023-03-22 2023-07-11 Общество с ограниченной ответственностью "Научно-производственное предприятие "ИТЭЛМА" Комбинация приборов транспортного средства с цветным tft 12,3''

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KR20170048249A (ko) 2017-05-08
CN110264874B (zh) 2021-02-09
JP2019019054A (ja) 2019-02-07
TW201613831A (en) 2016-04-16
TWI678341B (zh) 2019-12-01
JPWO2016027812A1 (ja) 2017-06-08
JP6631673B2 (ja) 2020-01-15
DE112015003842B4 (de) 2024-08-01
TWI722605B (zh) 2021-03-21
TW202003399A (zh) 2020-01-16
DE112015003842T5 (de) 2017-05-18
CN106604902B (zh) 2019-08-06
CN110264874A (zh) 2019-09-20
JP6418241B2 (ja) 2018-11-07

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