DE112020003480T5 - LAMINATED GLASS - Google Patents

Abstract

A laminated glass for a vehicle includes a vehicle-inside glass panel, a vehicle-outside glass panel, an intermediate film connecting the vehicle-inside glass panel and the vehicle-outside glass panel, and at least one planar light-emitting device enclosed in the intermediate film. The planar light-emitting device emits light of a predetermined color to the outside of the vehicle through the vehicle-outside glass panel. The intermediate sheet includes a first intermediate sheet to be bonded to the vehicle-inside glass panel, a second intermediate sheet to be bonded to the vehicle-outside glass panel, a third intermediate sheet to be sandwiched between the first intermediate sheet and the second intermediate sheet, and an edge portion of the planar light-emitting device surrounds. A visible light transmittance of the vehicle inside glass panel, the first intermediate sheet, or both is 70% or less.

Description

TECHNICAL AREA

The present invention relates to a laminated glass.

STATE OF THE ART

Techniques for attaching transmissive, planar light-emitting devices to vehicle windows (e.g., rear windows) are known. In this case, when light is emitted from the planar light-emitting device to the vehicle outside of the window of the vehicle, it is preferable that leakage of the light to the vehicle inside of the window of the vehicle is prevented. Accordingly, the planar light-emitting device to be mounted on the window of a vehicle is equipped with means for preventing light from leaking to the vehicle inside of the window of the vehicle when the planar light-emitting device emits light (see, for example, Patent Document 1 ).

DOCUMENT LIST

PATENT DOCUMENTS

PTL 1: Japanese Unexamined Patent Application Publication No. 2018-55930

SUMMARY OF THE INVENTION

TECHNICAL PROBLEM

However, the planar light-emitting device can be enclosed in the laminated glass. In this case, the measures taken for the planar light-emitting device are insufficient, and a glass plate, an interlayer and the like constituting the laminated glass are preferably provided with features for preventing the light from leaking to the vehicle inside.

The present invention has been made in view of the problems described above, and is to provide a laminated glass enclosing a planar light-emitting device that prevents the light from leaking to the vehicle interior when the planar light-emitting device emits light.

[Means for Solving the Problems]

According to one aspect of the present invention, a laminated glass for a vehicle comprises a vehicle-inside glass panel, a vehicle-outside glass panel, an intermediate film connecting the vehicle-inside glass panel and the vehicle-outside glass panel, and at least one planar light-emitting device enclosed in the intermediate film. The planar light-emitting device emits light of a predetermined color to the outside of the vehicle through the vehicle-outside glass panel. The intermediate sheet includes a first intermediate sheet to be bonded to the vehicle-inside glass panel, a second intermediate sheet to be bonded to the vehicle-outside glass panel, a third intermediate sheet to be sandwiched between the first intermediate sheet and the second intermediate sheet, and an edge portion of the planar light-emitting device surrounds. A visible light transmittance of the vehicle inside glass panel, the first intermediate sheet, or both is 70% or less.

EFFECTS OF THE INVENTION

According to an embodiment of the present disclosure, a laminated glass enclosing a planar light-emitting device that suppresses leakage of light to a vehicle inside when the planar light-emitting device emits light can be obtained.

character list

• [ 1 ] 1 12 is a diagram showing the laminated glass according to an embodiment of the present application.
• [ 2 ] 2 14 is a perspective view showing a curved shape of the laminated glass according to the embodiment of the present application.
• [ 3 ] 3 Fig. 12 is a diagram showing a mounting angle of the laminated glass.
• [ 4 ] 4 12 is a diagram showing a first example of arrangement of a planar light-emitting device in the laminated glass.
• [ 5 ] 5 12 is a diagram showing a second example of the arrangement of the planar light-emitting device in the laminated glass.
• [ 6 ] 6 13 is a diagram showing a third example of the arrangement of the planar light-emitting device in the laminated glass.
• [ 7 ] 7 13 is a diagram showing a fourth example of the arrangement of the planar light-emitting device in the laminated glass.
• [ 8th ] 8th Fig. 13 is a diagram showing a fifth example of arrangement of the planar light-emitting device in the laminated glass.
• [ 9 ] 9 12 is a diagram showing a sixth example of the arrangement of the planar light-emitting device in the laminated glass.
• [ 10 ] 10 12 is a diagram schematically showing a first example of the laminated glass having the planar light-emitting device and mounted on a vehicle.
• [ 11 ] 11 12 is a diagram schematically showing a second example of the laminated glass having the planar light-emitting device and mounted on the vehicle.
• [ 12 ] 12 13 is a diagram schematically showing a third example of the laminated glass having the planar light-emitting device and mounted on the vehicle.
• [ 13 ] 13 12 is a diagram schematically showing a fourth example of the laminated glass having the planar light-emitting device and mounted on the vehicle.

MODE FOR CARRYING OUT THE INVENTION

Embodiments for implementing the present invention will be described below with reference to drawings. In the drawings, the same reference numerals are attached to the same elements, and duplicated description may be omitted. Moreover, in some of the drawings, the size and shape may be partially exaggerated in order to facilitate understanding of the subject matter of the present invention.

Although the term vehicle refers specifically to an automobile, the term also refers to a mobile body that includes laminated glass, such as a train, a ship, and an airplane .an aircraft.

Furthermore, a plan view refers to viewing a given area of the laminated glass in a direction orthogonal to the inner surface of the laminated glass. A planar shape refers to a shape of the given area of the laminated glass as viewed orthogonally to the inner surface of the laminated glass.

the 1 12 is a diagram showing the laminated glass according to the embodiment of the present application. the 1(a) Fig. 12 is a diagram schematically showing the laminated glass mounted on a vehicle viewed from the vehicle inside of the vehicle to the vehicle outside. the 1(b) FIG. 14 is a cross-sectional view taken along a line AA in FIG 1(a) .

Like it in the 1 As shown, the laminated glass 10 is a laminated glass for a vehicle, which comprises a glass panel 11 , a glass panel 12 , an intermediate film 13 , a shielding layer 14 and a planar light emitting device 15 . However, the shielding layer 14 can be provided as required.

Although the 1 shows the laminated glass 10 having a flat plate shape as shown in FIG 2 As shown, the laminated glass 10 may have a double curved shape that is curved in both the longitudinal and transverse directions. Alternatively, the laminated glass 10 may have a simple curved shape curved only in the longitudinal direction or a simple curved shape curved only in the transverse direction. When the laminated glass 10 is curved, the laminated glass is preferably curved convexly toward the vehicle exterior of the vehicle. That is, in such a curved laminated glass, the vehicle-inside glass panel and the vehicle-outside glass panel can be distinguished only by the laminated glass 10 regardless of a relative position between the laminated glass and the vehicle.

In addition, although the 1 and 2 show the laminated glass 10 having a rectangular shape, the planar shape of the laminated glass 10 is not limited to the rectangular shape and may be a quadrangular shape including a trapezoidal shape or the like and may be any shape.

The laminated glass 10 can be applied to, for example, a windshield, a rear window, a rear quarter window, a rear triangle window, a roof window, auxiliary windows, and the like for a vehicle.

For example, when the rear window is mounted on the vehicle tilted forward, with only the rear window, a rear field of view of a driver of the vehicle is narrow and rear visibility is poor. An additional window is provided below the rear window of the vehicle to improve the rearward visibility of the driver of the vehicle.

The mounting angle θ _E of the auxiliary window may be different from the mounting angle θ _R of the rear window. The mounting angle θ _E of the additional window can be 50° or more with respect to the ground, and preferably 70° or more. The mounting angle θ _E of the additional window can be 90° or less. This refers, as in the 3(a) and 3(b) shown, the mounting angle θ is set to an angle between a center line L obtained by sequentially connecting midpoints in the horizontal widths of the laminated glass 10 from a lower side to an upper side, and a horizontal plane H (a plane parallel to the floor surface). the 3(a) 14 is a diagram schematically showing the laminated glass attached to the vehicle, viewed from the vehicle inside of the vehicle to the vehicle outside. the 3(b) shows a longitudinal cross section along the center line L in FIG 3(a) .

As described above, in the case where the rear window is mounted on the vehicle inclined forward, that is, the mounting angle θ _R of the rear window is 10° or more and 40° or less with respect to the ground, if further additional window is arranged below the rear window, wherein the mounting angle θ _E of the additional window is 50 ° or more with respect to the ground, the rear field of view of the driver of the vehicle can be made wider. In addition, the rear visibility of the driver of the vehicle can be improved and the visibility of an occupant in another vehicle or a passer-by located at the rear of the vehicle to the planar light-emitting device 15 arranged in the laminated glass 10 can be improved also be improved.

The laminated glass 10 is not limited to the additional window. When the mounting angle θ of the laminated glass 10 is 50° or more with respect to the ground, the laminated glass 10 may be a rear glass, a rear quarter glass, or a rear triangle glass. That is, the mounting angle θ of the laminated glass 10 with respect to the ground is preferably 50° or more, and more preferably 70° or more. In addition, the mounting angle θ with respect to the ground of the laminated glass 10 is preferably 90° or less.

Alternatively, the laminated glass 10 may be mounted such that the mounting angle θ of the laminated glass 10 is less than or equal to 10°, that is, the laminated glass is substantially parallel to the ground. That is, the laminated glass 10 may be a roof panel. If the laminated glass 10 is a roof glass, the planar light-emitting device 15, which is arranged in the laminated glass 10, as a direction indicator not only for the occupants inside the vehicle, but also for an occupant in another vehicle or a passer-by, a Hazard warning indicator, a warning indicator or an indicator light outside the vehicle to indicate that the vehicle is in automatic mode operation or that the vehicle is a vehicle intended to meet someone.

In particular, when the laminated glass 10 is a roof glass, the planar light-emitting device 15 emits light to the outside of the vehicle, that is, upward from the vehicle, so that a person occupying a position higher than the road on which the vehicle is, for example, can more easily determine whether the vehicle has been ordered by the person, and this is preferred.

The laminated glass 10 can be a windshield. When the laminated glass 10 is a windshield, the planar light-emitting device 15 can be used, for example, as a direction indicator not only for the occupant inside the vehicle but also for an occupant in another vehicle located in front of the vehicle or a passer-by, a hazard warning lamp , a warning display or a light display outside the vehicle indicating that the vehicle is in automatic operation or that the vehicle is a vehicle ready to meet someone.

When the laminated glass 10 is a windshield, the planar light-emitting device 15 is preferably arranged outside the inspection surface A as specified in JIS standard R3212:2015. When the planar light-emitting device 15 is arranged outside the inspection area A as specified in JIS standard R3212:2015, the planar light-emitting device 15 does not obstruct the driver's vision of the vehicle, and this is preferable.

The glass panel 11 is a vehicle interior side glass panel that is located on a vehicle interior side after the laminated glass 10 is mounted on the vehicle. The glass panel 12 is a vehicle-outside glass panel located on a vehicle exterior after the laminated glass 10 is mounted on the vehicle.

When the laminated glass 10 is curved, the radius of curvature is preferably 1000 mm or more and 100000 mm or less. The radii of curvature of the glass plate 11 and the glass plate 12 can be identical or different. When the radii of curvature of the glass plate 11 and the glass plate 12 are different, the radius of curvature of the glass plate 11 is larger than the radius of curvature of the glass plate 12.

The glass plate 11 and the glass plate 12 are a pair of opposing glass plates. The intermediate sheet 13 and the planar light-emitting device 15 are sandwiched between the pair of glass plates. The glass plate 11 and the glass plate 12 are attached to each other while the intermediate sheet 13 and the planar light-emitting device 15 are interposed therebetween.

The intermediate film 13 is a film connecting the glass panel 11 and the glass panel 12 . The intermediate sheet 13 includes, for example, an intermediate sheet 131 to be bonded to the glass panel 11, an intermediate sheet 132 to be bonded to the glass panel 12, and an intermediate sheet 133 to be interposed between the intermediate sheet 131 and the intermediate sheet 132, and an edge portion of the planar light-emitting device 15 surrounds. When it is not necessary to specifically distinguish between the intermediate sheets 131, 132 and 133, the intermediate sheet will be referred to simply as the intermediate sheet 13. Details of the glass plate 11, the glass plate 12 and the intermediate sheet 13 will be described later.

The shielding layer 14 is an opaque layer and may be provided in a band-like shape along an edge portion of the laminated glass 10, for example. The shielding layer 14 is, for example, an opaque (e.g. black) colored ceramic layer. The shielding layer 14 may be a colored intermediate film or a colored film having light-shielding properties, or a combination of a colored intermediate film and a colored ceramic layer. The colored sheet may be integrated with an infrared reflective sheet or film or the like.

According to the opaque shielding layer 14 provided in the laminated glass 10, degradation of a resin such as urethane holding the edge portion of the laminated glass 10 in a vehicle body due to ultraviolet light can be prevented. Furthermore, busbars and electrodes electrically connected to the planar light-emitting device 15 are covered by the vehicle exterior, the vehicle interior, or both.

The shielding layer 14 can be formed, for example, by applying a ceramic color paste containing a fusible glass frit containing a black pigment onto a glass plate by screen printing or the like and then firing it. The method is not limited to this. The shielding layer 14 can be formed, for example, by applying an organic ink containing a black or dark color pigment to a glass plate by screen printing or the like and then drying it.

As the shielding layer 14, known light-modulating elements (SPD (Suspended Particle Device), electrochromic materials, photochromic materials, thermochromic materials, PDLC (polymer dispersed liquid crystal), GHLC (guest-host liquid crystal) materials) can also be used and the like) can be used. The shielding layer 14 may further contain a colored pigment or the like to reduce the transmittance of the edge portion of the intermediate sheet 13 to be lower than the transmittance of other areas. Suitable pigments include, for example, organic colored pigments such as azo-based, phthalocyanine-based, quinacridone-based, perylene-based, perinone-based, dioxazine-based, anthraquinone-based and isoindolinone-based; and inorganic colored pigments such as oxides, hydroxides, sulfides, chromates, sulfates, carbonates, silicates, phosphates, arsenates, ferrocyanides, carbon and metal powders.

In the example of 1 and 2 the shielding layer 14 is provided on the edge portion of the inner surface of the glass panel 12 . However, the shielding layer 14 may be provided on the edge portion of the inner surface of the glass panel 11 or on both the edge portion of the inner surface of the glass panel 11 and the edge portion of the inner surface of the glass panel 12 as required.

The planar light-emitting device 15 is a surface-emitting type light-emitting device that uses an organic EL (organic electroluminescence), an inorganic EL (inorganic electroluminescence), an LED (light-emitting diode) or the like as a light source and light with a predetermined Color emitted through the glass panel 12 to the outside of the vehicle. The term LED here also includes micro-LEDs and mini-LEDs.

The planar light-emitting device 15 may include a light guide plate, a diffusion plate, a color filter, or the like as components in addition to the light source. Each of the components of the planar light-emitting device 15 is formed of a material that is substantially transparent so that the outside is made visible when the planar light-emitting device 15 is not emitting light.

The planar shape of the planar light-emitting device 15 is not particularly limited, and may be, for example, a rectangular shape that is smaller than the planar shape of the laminated glass 10. The planar light-emitting device 15 may be arranged on substantially the entirety of the laminated glass 10, or it may be positioned over a portion of the laminated glass 10, if desired.

The minimum ratio of a surface of the planar light-emitting device 15 to a surface of the laminated glass 10 is preferably 1% or more, and more preferably 5% or more. When the minimum ratio of the area of the planar light-emitting device 15 to the area of the laminated glass 10 is 1% or more, the emission of the light by the planar light-emitting device 15 is visible from the outside of the vehicle. The maximum ratio of the area of the planar light-emitting device 15 to the area of the laminated glass 10 may be less than or equal to 99%, if desired. In order to ensure the area for viewing the rear side by the driver of the vehicle, the proportion is preferably 95% or less, more preferably 80% or less, still more preferably 60% or less, still more preferably 50% or less, particularly preferably 40% or less, and especially 20% or less.

The edge portion of the planar light-emitting device 15 preferably overlaps with the shielding layer 14 in a plan view. In addition, there is at least a portion of the planar light-emitting device, preferably at least a portion of the edge portion of the plana Ren light emitting device 15 preferably on the vehicle inside of the shielding layer 14 provided in the edge portion on the vehicle inside surface of the glass panel 12 in a plan view. In a plan view, the area where the planar light-emitting device 15 overlaps with the shielding layer 14 may be the area where wiring, a bus bar, or the like for supplying current to the light-emitting device such as an organic EL device, is provided in the planar light-emitting device 15 . However, the surface may overlap at least a portion of the light emitting device. In a plan view, the entirety of the edge portion of the planar light-emitting device 15 may overlap with the shielding layer 14 .

The planar light-emitting device 15 may be arranged at the edge portion of the laminated glass 10 . Moreover, the planar light-emitting device 15 may be arranged on the laminated glass 10 or the plurality of planar light-emitting devices 15 may be arranged on the laminated glass 10.

In the case where the planar light-emitting device 15 is arranged on the laminated glass 10, the planar light-emitting device 15 may be arranged in the vicinity of either side of the laminated glass 10. The planar light-emitting device 15 can be, for example, near the upper side of the laminated glass 10, as shown in FIG 4 1, or near the lower side of the laminated glass 10 as shown in FIG 5 is shown. Alternatively, the planar light-emitting device 15 may be arranged near one side selected from the right and left sides of the laminated glass 10 .

In the case where the plurality of planar light-emitting devices 15 are arranged on the laminated glass 10, they may be arranged in the vicinity of the left side and the right side of the laminated glass 10, for example, as shown in FIG 6 1, or they may be located near the top and bottom of the laminated glass 10 as shown in FIG 7 is shown. That is, the plurality of planar light-emitting devices 15 may be arranged in the vicinity of the opposite sides of the laminated glass 10 . In addition, as in the 8th and 9 As shown, a plurality of planar light-emitting devices 15 may be arranged in an array in the vicinity of one side selected from the top side and the bottom side of the laminated glass 10 . Alternatively, the planar light-emitting devices 15 may be arranged in an array near one side selected from the right side and the left side of the laminated glass 10 . Although the 6 until 9 Showing the two planar light-emitting devices 15, the number of the planar light-emitting devices 15 is not limited to two, and there may be three or more.

The planar light-emitting device 15 is enclosed in the intermediate sheet 13 . The surface of the planar light-emitting device 15 on the glass plate 11 side is coated with the intermediate film 131 , and the surface of the planar light-emitting device 15 on the glass plate 12 side is coated with the intermediate film 132 . Further, the edge portion (side surface) of the planar light emitting device 15 is coated with the intermediate sheet 133 having a frame-like shape.

The width W (the width of the frame) of the intermediate sheet 133 is preferably 5 mm or more, more preferably 10 mm or more, and still more preferably 20 mm or more. When the width W of the intermediate sheet 133 is 5 mm or more, the planar light-emitting device 15 can be sufficiently protected, and when the width W increases to 10 mm or more and 20 mm or more, the effect of protecting the planar light-emitting device 15 increases . Further, since the stress change of the glass plates 11 and 12 around the planar light-emitting device 15 does not affect the edges of the glass plates 11 and 12, which are relatively weaker than the plane, cracking of the glass plates 11 and 12 can be suppressed.

The edge portion of the planar light-emitting device 15 and edge portions of the glass plates 11 and 12 need not necessarily be parallel to each other. In the case where the edge portion of the planar light-emitting device 15 is not parallel to the edge portions of the glass plates 11 and 12, the width W (the width of the frame) of the intermediate sheet 133 described above refers to a width of the narrowest section of the frame.

An outer edge portion of the intermediate sheet 13 is preferably edge-processed. That is, end portions (edges) of the intermediate sheet 13 are preferably processed so that they do not protrude significantly from end portions (edges) of the glass plates 11 and 12. When the amount of protrusion of the end portions of the intermediate sheet 13 from the end portions of the glass plates 11 and 12 is 150 µm or less, the appearance is not adversely affected and this is preferable. However, when the laminated glass 10 is a side panel, a lower side is hidden by the door panel, so the edge processing for the lower side of the intermediate sheet 13 is not mandatory.

The color of the light emitted from the planar light-emitting device 15 to the outside of the vehicle through the glass panel 12 may be red, white, blue, or yellow. For example, when the laminated glass 10 is used in the rear window that is visible from a following vehicle, "red" indicates braking at the additional window located below the rear window or the like. "White" indicates reverse gear is engaged. "Blue" (especially turquoise blue) indicates that the vehicle is in automatic mode. "Yellow" is assigned to the warning light.

the 10 until 13 are diagrams showing the laminated glass with the planar light-emitting device mounted on an automobile.

In the 10 For example, the rear window of the automobile 100 is the laminated glass 10, and the planar light-emitting device 15 is arranged near an upper side of the laminated glass 10. FIG. The planar light-emitting device 15 is, for example, a red overhead stop lamp.

In the 11 For example, the rear glass of the automobile 100 is the laminated glass 10, and the planar light-emitting device 15 is arranged near a lower side of the laminated glass 10. FIG. The planar light-emitting device 15 is, for example, a blue light that indicates that the automobile 100 is in automatic mode.

In the 12 For example, the additional window located below the rear window of the automobile 100 is the laminated glass 10, and the planar light-emitting device 15 is located near the left side of the laminated glass 10 and the planar light-emitting device 15 is near the right Side of the laminated glass 10 arranged. In the 13 For example, the additional window arranged below the rear window of the automobile 100 is the laminated glass 10, and the planar light-emitting device 15 is arranged near one end of the lower side of the laminated glass 10 and the planar light-emitting device 15 is near another end of the lower side of the laminated glass 10 is arranged. In the 12 and 13 For example, the planar light-emitting device 15 is a white light indicating that reverse gear is engaged, an amber warning light, a red auxiliary brake light, or the like.

The planar light-emitting device 15 can be configured to emit a plurality of colors of red, white, blue, and yellow. The planar light-emitting device 15 can also be configured to switch between a plurality of colors of red, white, blue, and yellow using a color filter.

The glass plate 11, the glass plate 12 and the intermediate sheet 13 will be described in detail below.

[glass plate]

The glass plates 11 and 12 may be an inorganic glass or an organic glass. For example, as the inorganic glass, a soda-lime glass, an aluminosilicate glass, a borosilicate glass, an alkali-free glass, or a quartz glass can be used without limitation. The glass plate 12, which is outside the laminated glass 10, is preferably an inorganic glass in view of scratch resistance and is preferably a soda-lime glass in view of formability. When the glass plate 11 and the glass plate 12 are a soda-lime glass, a clear glass, a green glass containing a predetermined amount or more of an iron content, and a green UV-blocking glass can be preferably used.

The inorganic glass can be either an untempered glass or a tempered glass. The untempered glass is formed by forming a molten glass into a sheet and slowly cooling it received the same. The tempered glass is formed by forming a compressive stress layer on a surface of the untempered glass.

The toughened glass can be either a physically toughened glass, such as an air-cooled toughened glass, or a chemically toughened glass. In the case of a physically toughened glass, the glass surface can be strengthened by forming a compressive stress layer on the glass surface according to a difference between a temperature on the glass surface and a temperature inside the glass by a process other than slow cooling, such as rapid cooling a uniformly heated glass sheet in the bending/forming process from the temperature near the softening point.

In the case of a chemically strengthened glass, for example, the glass surface can be strengthened after the bending/forming process by generating compressive stress on the glass surface by the ion exchange method or the like. In addition, a glass that absorbs ultraviolet light or infrared light can also be used. Further, the glass is preferably transparent, but a glass colored to the extent that the transparency is not adversely affected can be used.

The material of the organic glass includes a polycarbonate resin, for example, an acrylic resin such as polymethyl methacrylate, or a transparent resin such as polyvinyl chloride or polystyrene.

The shapes of the glass plates 11 and 12 are not particularly limited to rectangular shapes, but may have various shapes and curvatures. In the bending/forming process for the glass plates 11 and 12, gravity forming, compression molding, roll forming or the like is used. The forming method of the glass plates 11 and 12 is not particularly limited, but, for example, in the case of using an inorganic glass, a glass plate formed using the float method or the like is preferably used.

The plate thickness of the thinnest portion of the glass plate 12 is preferably 1.1 mm or more and 3 mm or less. When the plate thickness of the glass plate 12 is 1.1 mm or more, strength such as resistance to a flying stone is sufficient. When the panel thickness is 3 mm or less, the laminated glass 10 is not excessively heavy, and this is preferable in view of fuel efficiency of the vehicle. The plate thickness of the thinnest portion of the glass plate 12 is more preferably 1.8 mm or more and 2.8 mm or less, still more preferably 1.8 mm or more and 2.6 mm or less, still more preferably 1.8 mm or more more and 2.2 mm or less and in particular 1.8 mm or more and 2.0 mm or less.

The plate thickness of the glass plate 11 is preferably 0.3 mm or more and 2.3 mm or less. When the plate thickness of the glass plate 11 is 0.3mm or more, handling of the glass plate becomes easy. When the panel thickness is 2.3mm or less, the laminated glass is not excessively heavy.

The glass plates 11 and 12 may have planar shapes or curved shapes. However, when the glass plates 11 and 12 have curved shapes and the thickness of the glass plate 11 is not appropriate, forming two glass plates 11 and 12 that are particularly curved causes a mismatch between the shapes of the two glass plates, which affects the glass quality such as eg the residual stress after pressing, strongly influenced.

By setting the plate thickness of the glass plate 11 to 0.3 mm or more and 2.3 mm or less, glass quality such as residual stress can be maintained. Setting the plate thickness of the glass plate 11 to 0.3mm or more and 2.3mm or less is particularly effective for maintaining glass quality for sharply curved glasses. The plate thickness of the glass plate 11 is more preferably 0.5 mm or more and 2.1 mm or less, and still more preferably 0.7 mm or more and 1.9 mm or less. When the plate thickness is within the range described above, the effect described above becomes more remarkable.

A coating having a water-repellent function, an ultraviolet light-cutting function, an infrared light-cutting function, low-reflection properties, or low-emissivity properties may be provided outside the glass panel 11, the glass panel 12, or both. In addition, a coating can be provided with an ultraviolet light cutoff function, an infrared light cutoff function, low emission properties, a visible light absorbing function, a coloring function or the like may be provided on the glass plate 11, the glass plate 12, or both on a side in contact with the intermediate film 13.

In the case where the glass plates 11 and 12 are an inorganic glass having a curved shape, the glass plates 11 and 12 are bent after being formed by the float method and before being bonded by the intermediate sheet 13 . The glass plates are heated so that they are soft and bent. The heating temperature of the glass during bending and forming is about 550°C to 700°C.

[intermediate film]

Thermoplastic resins are often used for the intermediate film 13 . Thermoplastic resins which have been used for such applications include, for example, plasticized polyvinyl acetal resins, plasticized polyvinyl chloride-based resins, saturated polyester-based resins, plasticized saturated polyester-based resins, polyurethane-based resins, plasticized polyurethane-based resins , ethylene-vinyl acetate copolymer-based resins, ethylene-ethyl acrylate copolymer-based resins, cycloolefin polymer resins and ionomer resins. Resin compositions containing modified block copolymer hydrides as in the Japanese Patent No. 6065221 are also preferably used.

Of the resins described above, a plasticized polyvinyl acetal resin is preferably used because it has an excellent balance of performance properties such as transparency, weather resistance, strength, bonding strength, penetration resistance, impact energy absorbency, moisture resistance, heat insulating properties and sound insulating properties. One of the thermoplastic resins can be used alone, or two or more kinds of thermoplastic resins can be used in combination. The term "plasticized" when referring to the plasticized polyvinyl acetal resin means that the resin is made moldable by adding a plasticizer. The same applies to the other plasticized resins.

However, when a device such as the planar light-emitting device 15 is sealed in the intermediate sheet 13, depending on the kind of the sealed device, the device may be deteriorated by a specific plasticizer. In such a case, it is preferable to use a resin substantially free from plasticizers. That is, the intermediate sheet 13 may preferably not contain a plasticizer. The resin containing no plasticizer includes, for example, an ethylene-vinyl acetate copolymer resin.

The polyvinyl acetal resin may include a polyvinyl formal resin obtained by reacting polyvinyl alcohol (hereinafter may be referred to as "PVA") and formaldehyde, a narrowly defined polyvinyl acetal resin obtained by reacting PVA and acetaldehyde, a polyvinyl butyral resin (hereinafter may be referred to as " PVB”) obtained by reacting PVA and n-butyl aldehyde, and the like. In particular, a PVB is preferred because of its excellent balance of performance properties such as transparency, weather resistance, strength, bonding strength, penetration resistance, impact energy absorbency, moisture resistance, heat insulating properties and sound insulating properties. One of the polyvinyl acetal resins can be used alone, or two or more kinds of polyvinyl acetal resins can be used in combination.

However, the material constituting the intermediate sheet 13 is not limited to a thermoplastic resin. The intermediate sheet 13 may include functional particles such as infrared absorbers, ultraviolet absorbers, luminescent agents, and colorants. In addition, the intermediate sheet 13 may also have a colored portion referred to as a tint band.

The film thickness of the thinnest portion of the intermediate film 13 is preferably 0.5 mm or more. If the film thickness of the thinnest portion of the intermediate film 13 is 0.5mm or more, the impact resistance required for the laminated glass is satisfied. In addition, the film thickness of the thickest portion of the intermediate film 13 is preferably 3 mm or less. When the sheet thickness of the intermediate sheet 13 is 3mm or less, the laminated glass is not excessively heavy. The film thickness of the thickest portion of the intermediate film 13 is more preferably 2.8 mm or less, and still more preferably 2.6 mm or less.

The intermediate film 13 can have four or more layers. For example, the sound insulation properties of the laminated glass 10 can be improved by forming the intermediate film with four or more layers and reducing the shear modulus of any layer other than the outermost two layers to be smaller than the shear modulus of the outermost two layers by adjusting the plasticizer or the like can be improved. In this case, the shear moduli of the outermost two layers can be the same or different.

Furthermore, although all of the intermediate sheets 131, 132 and 133 included in the intermediate sheet 13 are preferably formed of the same material, some or all of the intermediate sheets 131, 132 and 133 may be formed of different materials. For example, the shear modulus of intermediate sheet 133 may be less than the shear modulus of intermediate sheets 131 and 132 . When the shear modulus of the intermediate sheet 133 is less than the shear modulus of the intermediate sheets 131 and 132, the sound insulating properties of the laminated glass 10 can be improved. Even if the shear modulus of the intermediate sheet 131 is smaller than the shear modulus of the intermediate sheets 132 and 133, the sound insulating properties of the laminated glass 10 can be improved. Further, even if the shear modulus of the intermediate sheet 132 is smaller than the shear modulus of the intermediate sheets 131 and 133, the sound insulating properties of the laminated glass 10 can be improved. In view of the bonding properties with the glass plates 11 and 12 or the functional material included in the laminated glass 10, the material described above is preferably used in a portion of 50% or more of the thickness of the intermediate sheet 13.

The intermediate sheet 13 is produced, for example, by appropriately selecting the above-described resin material for the intermediate sheet, and extruding and molding in a heated melt state using an extruder. The extrusion conditions such as the extrusion speed of the extruder are adjusted to be uniform. Thereafter, the extruded resin sheet is stretched to conform to the configuration of the laminated glass, for example, to provide a curvature on the top and bottom, if necessary. In this way, the intermediate sheet 13 is completed.

[Laminated Glass]

The total thickness of the laminated glass 10 is preferably 2.8 mm or more and 10 mm or less. If the total thickness of the laminated glass 10 is 2.8mm or more, sufficient rigidity can be secured. Further, when the total thickness of the laminated glass 10 is 10 mm or less, sufficient transmittance can be obtained and haze can be reduced.

On at least one side of the laminated glass 10, the plate displacement between the glass plates 11 and 12 is preferably 1.5 mm or less, and more preferably 1 mm or less. Here, the plate displacement between the glass plates 11 and 12 in a plan view refers to the amount of deviation between an end portion of the glass plate 11 and an end portion of the glass plate 12.

When the sheet displacement between the glass sheets 11 and 12 is 1.5 mm or less on at least one side of the laminated glass 10, the sheet displacement does not affect the appearance of the laminated glass 10, and this is preferable. When the sheet displacement between the glass sheets 11 and 12 is 1.0 mm or less on at least one side of the laminated glass 10, the sheet displacement does not affect the appearance of the laminated glass 10, and this is more preferable.

The laminated glass 10 is manufactured in the following manner. The intermediate sheet 13 and the planar light-emitting device 15 are sandwiched between the glass plate 11 and the glass plate 12 to form a laminated body. Then, the laminated body is placed in a rubber bag, for example, and the bonding operation is carried out at a temperature of about 70°C to 110°C in a vacuum of -65 to -100 kPa. The heating conditions, temperature conditions, and laminating method are appropriately selected in view of the type of the planar light-emitting device 15, for example, so that the planar light-emitting device is prevented from deteriorating during the laminating process.

Further, by performing the bonding process of heating and pressurizing under the conditions of, for example, a temperature of 100 to 150°C and a pressure from 0.6 to 1.3 MPa, the laminated glass 10 having an even better durability can be obtained. However, this heating and pressurizing process cannot be used in some cases in order to simplify the manufacturing process or to take into account the properties of the material included in the laminated glass 10.

The "cold bending" method can be used. In “cold bending”, either or both of the glass plate 11 and the glass plate 12 are bonded in a state of being elastically deformed. The "cold bending" can be performed using a laminated body comprising a glass plate 11 fixed with a temporarily fixing means such as an adhesive tape, a glass plate 12, an intermediate film 13 and a planar light-emitting device 15, a pre-pressing device, such as a squeegee or a rubber bag, and an autoclave, which are known.

Between the glass plate 11 and the glass plate 12, in addition to the intermediate film 13 and the planar light-emitting device 15, a film or a device having a function such as electric heating wiring, infrared reflection, light emission, power generation, light control , a touch panel, a visible light reflection, a scattering, a decoration or an absorption can be provided to an extent that the effect of the present application is not impaired. Further, the surface of the laminated glass 10 may have a film having functions of anti-fogging, water repellency, heat shielding, low reflection or the like. Moreover, the outer surface of the glass plate 11 or the inner surface of the glass plate 12 may have a film having a function of heat shielding, heat generation, or the like.

[Escape of Light to the Vehicle Inside]

The planar light-emitting device 15 emits light of a predetermined color to the outside of the vehicle through the glass panel 12, however, in view of the comfort of the vehicle occupant, it is preferable to reduce light leakage to the vehicle inside when the planar light-emitting device 15 emits light .

Leaking of light to the vehicle inside when the planar light emitting device 15 emits light includes light that directly exits from the planar light emitting device 15 into the vehicle inside and light that is emitted from the planar light emitting device 15 to the vehicle outside that is diffusely reflected in the laminated glass 10 and exits into the vehicle interior.

Since there is no statutory requirement for the visible light transmittance of a rear quarter window, a rear window, an additional window, a roof window and the like, the visible light transmittances can be set to any values. Then, in the laminated glass 10, the visible light transmittance of the glass plate 11, the intermediate film 131, or both located on the vehicle inside of the planar light-emitting device 15 is adjusted to 70% or less.

That is, in the laminated glass 10, the visible light transmittance of the glass plate 11 is 70% or less, and the visible light transmittance of the intermediate film 131 is greater than 70%. Alternatively, the visible light transmittance of the intermediate sheet 131 is 70% or less, and the visible light transmittance of the glass plate 11 is greater than 70%. Alternatively, the visible light transmittance of the glass plate 11 is 70% or less, and the visible light transmittance of the intermediate film 131 is 70% or less. The visible light transmittance can be measured according to JIS R 3106:1998. In addition, when the visible light transmittance of the laminated glass 10 is measured, the planar light-emitting device 15 does not emit light.

Accordingly, by setting the visible light transmittance of the glass plate 11, the intermediate film 131, or both to 70% or less, the glass plate 11, the intermediate film 131, or both absorb unnecessary light. Therefore, both light exiting directly from the planar light-emitting device 15 into the vehicle interior and light emitted from the planar light-emitting device 15 to the vehicle exterior, diffusely reflected in the laminated glass 10 and exiting the vehicle interior, be diminished. Consequently, the comfort of the occupant of the vehicle can be increased.

The visible light transmittance of the glass plate 11, the intermediate film 131 or both is more preferably 60% or less, more preferably 50% or less, more preferably 40% or less, more preferably 30% or less, more preferably 20% or less , more preferably 10% or less and even more preferably 5% or less. When the visible light transmittance becomes lower, light leakage to the vehicle interior during emission of the planar light-emitting device 15 can be prevented.

The problem that light emitted from the planar light-emitting device 15 to the vehicle outside is diffusely reflected in the laminated glass 10 and leaks into the vehicle inside is a problem solved by enclosing the planar light-emitting device 15 in the laminated glass 10 reoccurs, which is not a traditional problem.

Here, a portion overlapping with the planar light-emitting device 15 in a plan view is referred to as area A, and the other portion (non-overlapping portion) is referred to as area B in a plan view. The visible light transmittance of the glass plate 11, the intermediate film 131 or both may be the same or partially different, for example the visible light transmittance of region A may differ from that of region B. When the visible light transmittance of the glass plate 11, the intermediate sheet 131, or both of them in the region A is 70% or less, light directly leaking from the planar light-emitting device 15 into the vehicle interior can be reduced. When the visible light transmittance in the region B is 70% or less, light that is emitted from the planar light-emitting device 15 to the vehicle outside and that is diffusely reflected in the laminated glass 10 and leaks into the vehicle inside can be reduced.

Further, when the visible light transmittance of the glass plate 11, the intermediate sheet 131, or both of them in the area A is smaller than that in the area B, light directly leaking from the planar light-emitting device 15 into the vehicle interior can be effectively reduced will. Conversely, if the visible light transmittance of the glass plate 11, the intermediate sheet 131, or both in the region A is greater than that in the region B, consistent with the decrease in visible light transmittance through the planar light-emitting device 15, the laminated Glass 10 can reduce the difference in visible light transmittance between area A and area B, and planar light-emitting device 15 can be made inconspicuous when planar light-emitting device 15 does not emit light.

In order to set the transmittance of the glass plate 11 for visible light to less than or equal to 70%, a so-called privacy glass (also referred to as dark gray glass), for example, can be used as the glass plate 11 . In particular, by adjusting the total iron content, which has been converted to Fe ₂ O ₃ , in the glass plate 11, the visible light transmittance of the glass plate 11 can be reduced to 70% or less. Furthermore, by partially hollowing the glass plate 11 and fitting the glass plate having a different visible light transmittance into the hollowed portion, the visible light transmittance of the glass plate 11 can be partially changed.

As an example of the composition of the privacy glass, this includes, given in mass % of an oxide, as a glass matrix composition, 66 to 75% SiO ₂ , 10 to 20% Na ₂ O, 5 to 15% CaO, 0 to 6% MgO, 0 to 5% Al ₂ O ₃ , 0 to 5% K ₂ O, 0.13 to 0.9% FeO, greater than or equal to 0.8% and less than 2.4% total iron based on Fe ₂ O ₃ and greater than 1% and less than or equal to 5% or less TiO ₂ , and based on the total amount of components of the glass matrix composition 100 to 500 ppm by mass of CoO, 0 to 70 ppm by mass of Se and 0 to 800 ppm by mass of Cr ₂ O ₃ , wherein the total amount of CoO, Se and Cr ₂ O ₃ is less than 0.1% by mass.

The privacy glass, for example, is in WO 2015/088026 described in detail, the contents of which are incorporated herein by reference.

Alternatively, instead of using a privacy glass as the glass panel 11, a privacy film may be attached to the vehicle inner side of the glass panel 11 having a visible light transmittance of more than 70% to reduce the visible light transmittance of the glass panel 11 to 70% or less. The privacy films include, for example, resin films such as tinted films. The visible light transmittance of the glass panel 11 can be partially modified by using the privacy sheet or by using a privacy sheet having a partially different visible light transmittance.

In order to set the visible light transmittance of the intermediate film 131 to 70% or less, a so-called colored intermediate film (for example, a gray intermediate film) can be used, for example. Moreover, by partially hollowing out the intermediate sheet 131 and fitting an intermediate sheet having a different visible light transmittance into the hollowed portion of the intermediate sheet, the visible light transmittance of the glass panel 11 can be partially changed.

The colored interlayer can be made by coloring the material exemplified in the "interlayer" section. In particular, a colorant is incorporated into the composition mainly containing a thermoplastic resin, and thereby the colored intermediate sheet is obtained. The colored intermediate film can contain a plasticizer to adjust the glass transition point.

The colorants are not particularly limited as long as the colorants decrease visible light transmittance, and include dyes, inorganic pigments, organic pigments, and the like. Of the colorants described above, inorganic pigments or organic pigments are preferred because they are less likely to cause discoloration due to long-term use, and inorganic pigments are preferred because they are excellent in light resistance.

Suitable organic pigments include black pigments such as aniline black, red pigments such as alizarin lake, and the like. Suitable inorganic pigments include carbon based pigments and metal oxide based pigments. Suitable pigments include, for example, black pigments such as carbon black, ivory black, Martian black, peach black, lamp black, and magnetite-type triiron tetraoxide; brown pigments such as amber yellow, burnt amber yellow, Walker yellow, Van Dyke brown, Sienna and burnt Sienna; red pigments such as bengal red, molybdenum red and cadmium red; orange pigments such as chrome orange and chrome vermilion; blue pigments such as ultramarine blue, Prussian blue, cobalt blue and cobalt cerulean blue; green pigments such as chromium oxide, viridian green, emerald green and cobalt green; yellow pigments such as chrome yellow, cadmium yellow, yellow iron oxide and titanium yellow; violet pigments such as manganese violet and mineral violet; and the same. One of the colorants can be used alone, or two or more kinds of colorants can be used in combination.

The blended amount of the colorant is an amount such that the visible light transmittance of the intermediate film 131 is 70% or less. The colored intermediate film may further contain one or more kinds of additives such as infrared absorbers, ultraviolet absorbers, fluorescent agents, adhesion adjusters, adhesion promoters, surfactants, antioxidants, heat stabilizers, light stabilizers, water removing agents, defoamers, antistatic agents and flame retardants.

The colored intermediate sheet can be produced by forming a print layer of a dark color on a surface of the non-colored intermediate sheet 131 to produce the colored intermediate sheet. As a method for forming a dark color print layer, a conventional printing method using a colored material on a resin substrate can be used. The colored materials include organic and inorganic pigments corresponding to the colorants described above. Since the printing layer in the present case does not require durability at the temperature near the softening point of glass like a ceramic shielding layer, an organic pigment containing carbon black, for example, can be used. The thickness of the printing layer may be appropriately set to a thickness such that the visible light transmittance of the intermediate sheet 131 is 70% or less.

In addition, the visible light transmittance of the intermediate sheet 131 can be significantly reduced by using the colored intermediate sheet. For example, the visible light transmittance of the intermediate sheet 131 can be set to 20% or less, 10% or less, or 5% or less.

Further, when the visible light transmittance of the glass plate 11 is 70% or less, since the composition of the glass plate 11 and the composition of the glass plate 12 cannot be the same, the bending conditions are different for both glass plates. Consequently, when the glass plates 11 and 12 have curved shapes, it is difficult to bend the glass plate 11 and the glass plate 12 with shape accuracy to an extent that the laminated glass 10 can be easily manufactured.

Therefore, when the glass plates 11 and 12 have curved shapes, the visible light transmittance of the intermediate sheet 131 is preferably set to 70% or less instead of setting the visible light transmittance of the glass plate 11 to 70% or less. In this case, since the composition of the glass sheet 11 and the composition of the glass sheet 12 can be set identically and the bending conditions of the glass sheet 11 and the glass sheet 12 can be made identical, the laminated glass 10 can be easily manufactured. Further, the glass plate 12 having the visible light transmittance of 70% or less having the same composition as that of the glass plate 11 having the visible light transmittance of 70% or less can be used. That is, the glass plate 11 and the glass plate 12 preferably have the same composition.

In addition to the measure of adjusting the visible light transmittance of the glass panel 11, the intermediate film 131, or both to 70% or less, an anti-reflective coating or anti-reflective film (AR coating) may be provided on the vehicle inside, the vehicle outside, or both of the glass panel 12 . Further, a coating or a film having a high reflectance (half mirror) may also be provided on the vehicle inside, the vehicle outside, or both of the glass panel 11 . In addition, the glass panel 11 may also be provided with a coating or film that scatters light, or irregularities that scatter light, on the vehicle inside, the vehicle outside, or both. Implementation of one or more of the measures described above can further reduce the light leakage to the interior of the vehicle when the planar light-emitting device 15 emits light.

In addition to leaking the light into the interior of the vehicle when the planar light-emitting device 15 emits light, the edge portion of the glass panel 11 can emit light when the planar light-emitting device 15 emits light. This is because light emitted from the planar light-emitting device 15 to the outside of the vehicle is irregularly reflected in the laminated glass 10 and leaks from the edge portion of the glass panel 11 .

In order to prevent the emission of light from the edge portion of the glass plate 11, in the laminated glass 10, the visible light transmittance of the glass plate 11, the intermediate film 131 or both can be set to 70% or less, and the visible light transmittance of the intermediate film 133 can be set can be set to 70% or less. The method for setting the visible light transmittance of the intermediate film 133 to be 70% or less is the same as the method for setting the visible light transmittance of the intermediate film 131 to be 70% or less.

Since the intermediate film 133 absorbs unnecessary light by setting the visible light transmittance of the intermediate film 133 to 70% or less, scattered reflection is prevented and the edge portion of the glass plate 11 can be prevented from emitting light when the planar light-emitting device 15 emits light . As a result, the comfort of the occupant of the vehicle can be increased.

The maximum visible light transmittance T _{V A} in the area A of the laminated glass 10 is preferably 5% or more, more preferably 10% or more, still more preferably 15% or more, and particularly preferably 18% or more. If _{TV A} is 5% or more, light is visually recognized on the opposite side of the laminated glass 10, and the laminated glass 10 can be suitably used as a vehicle window. Furthermore, T _VA is preferably 45% or less, more preferably 40% or less, even more preferably 30% or less, particularly preferably 20% or less, and particularly preferably 12% or less. For example, in a plan view, when the area A of the laminated glass 10 has an overlapping portion and a non-overlapping portion with the shielding layer 14, T _{V A} may also be referred to as the visible light transmittance in the non-overlapping portion with the shielding layer 14 (also referred to as the "aperture"). In the laminated glass 10, the visible light transmittance at the opening is preferably uniform. For example, the difference between the maximum value and the minimum value of the visible light transmittance is preferably 5% or less.

The maximum visible light transmittance T _{V B} in the region B of the laminated glass 10 is preferably 5% or more, more preferably 10% or more, still more preferably 15% or more, and particularly preferably 18% or more. If _{TV B} is 5% or more, light is visually recognized on the opposite side of the laminated glass 10, and the laminated glass 10 can be suitably used as a vehicle window. In addition, T _V is _B preferably 70% or less, more preferably 50% or less, even more preferably 40% or less, particularly preferably 30% or less and especially 20% or less. However, if the entire area B with the shield layer 14 overlaps in a plan view, this is not the case and a smaller T _{V B} is preferred. In this case, for example, T is _{V B} preferably 10% or less, more preferably 5% or less, even more preferably 1% or less and most preferably 0%.

The ratio of the light emitted by the planar light-emitting device 15 that is radiated from the vehicle-inside glass panel 11 (brightness L _i ) to the sum of the light that is radiated from the vehicle-inside glass panel 11 (brightness L _i ), and the Light emitted by the planar light-emitting device 15 radiated from the vehicle-outside glass panel 12 (brightness L _o ) is preferably 10% or less, more preferably 8% or less, even more preferably 5% or less, even more preferably 4% or less, more preferably 3.5% or less and especially 3% or less. When the proportion of the light (brightness L _i ) radiated from the vehicle-inside glass panel 11 is 10% or less, the leakage of light into the interior of the vehicle is small, and this is preferable. The light (brightness) emitted from the vehicle inside/outside glass panel of the vehicle can be measured according to JIS C7614:1993.

EXAMPLES

Hereinafter, the present invention will be described in more detail with reference to examples. The present invention is in no way limited to the examples described below.

With respect to the laminated glass in each of Examples 1 to 4, the visible light transmittance Tv [%] and the proportion of lightness L _i to lightness L _o [%] were obtained by simulations. Examples 1 to 3 were practical examples and Example 4 is a comparative example.

(simulation conditions)

As the planar light-emitting device, a red OLED having a ratio of the brightness of one surface to the brightness of another surface of 9:1 was used, and was arranged so that the brightness to the vehicle outside of the vehicle was larger than the brightness to the vehicle inside. The values of the color parameters of red light in the Yxy color system were Y=90, x=0.735 and y=0.265 on the side where the proportion of lightness was 9, and Y=10, x=0.730 and y=0.263, respectively the side where the proportion of lightness was 1. The proportion of brightness radiated from the vehicle-inside glass panel and the proportion of brightness radiated from the vehicle-outside glass panel are calculated as the proportion of brightness of light radiated from the vehicle-inside glass panel to the sum of the brightness of light radiated from the vehicle-inside glass panel and the brightness of light radiated from the vehicle-outside glass panel (L _i + L _o ), or as a proportion of the brightness of light radiated from the vehicle-outside glass panel to the sum shown. As the brightness, a value obtained in a direction orthogonal to the plane surface of the red OLED was used. _{TV A} is the maximum visible light transmittance within a section overlapping with the red OLED in a plan view, and T _{V B} is the maximum visible light transmittance within a portion that does not overlap the red OLED in a plan view.

(Example 1)

The laminating order of the laminated glass according to Example 1 was, from the vehicle outside of the vehicle, a green glass (2 mm thick), a non-colored intermediate sheet (0.76 mm thick) made of PVB, a red OLED, a colored interlayer (0.76 mm thick) made of PVB and a green glass (2 mm thick). The laminated glass according to Example 1 did not have a shielding layer. The visible light transmittance of the colored intermediate sheet made of PVB was 20%.

(Example 2)

The laminating order of the laminated glass according to Example 2 was, from the vehicle outside of the vehicle, a green glass (2 mm thick), a non-colored intermediate sheet (0.76 mm thick) made of PVB, a red OLED, a non-colored interlayer (0.76 mm thick) made of PVB and a privacy glass (2 mm thick). The laminated glass according to Example 2 did not have a shielding layer. The visible light transmittance of the privacy glass was 20%.

(Example 3)

The laminating order of the laminated glass according to Example 3 was, from the vehicle outside of the vehicle, a green glass (2 mm thick), a non-colored intermediate sheet (0.76 mm thick) made of PVB, a red OLED, a colored interlayer (0.76 mm thick) made of PVB and a green glass (2 mm thick). The laminated glass according to Example 3 did not have a shielding layer. The visible light transmittance of the colored intermediate sheet made of PVB was 37.2%.

(Example 4)

The laminating order of the laminated glass according to Example 4 was, from the vehicle outside of the vehicle, a green glass (2 mm thick), a non-colored intermediate sheet (0.76 mm thick) made of PVB, a red OLED, a non-colored interlayer (0.76 mm thick) made of PVB and a green glass (2 mm thick). The laminated glass according to Example 4 did not have a shielding layer.

TABLE 1 shows the results of simulations for T _{V A} , _{TV B} and L _i /(L _i +L _o ). [TABLE 1] Vehicle exterior glass panel Intermediate film (vehicle exterior) Intermediate foil (vehicle interior) Vehicle interior glass panel Maximum transmission of visible light L _i /(L _i + L _o ) TV _A TV _B Ex 1 green glass PVB interlayer Colored PVB interlayer (Visible Light Transmission = 20%) green glass 10.9% 18.2% 2.17% Ex 2 green glass PVB interlayer PVB interlayer Privacy Glass (Visible Light Transmission = 20.0%) 11.0% 18.4% 3.48% Ex 3 green glass PVB interlayer Colored PVB interlayer (Visible Light Transmission = 37.2%) green glass 20.0% 33.3% 4.18% Ex 4 green glass PVB interlayer PVB interlayer green glass 47.8% 79.6% 13.1%

It can be seen from TABLE 1 that Tv _A , Tv _B and L _i /(L _i +L _o ) in the laminated glass according to each of the practical examples (Examples 1 to 3) are smaller than Tv _A , Tv _B and L _i , respectively /(L _i +L _o ) in the laminated glass according to the comparative example (Example 4). Accordingly, it can be seen that the laminated glass according to the practical examples (Examples 1 to 3) can prevent light leakage into the interior of the vehicle when the planar light-emitting device emits light.

As described above, preferred embodiments and the like have been described in detail. However, the present invention is not limited to the embodiments or the like, but various variations and substitutions can be made without departing from the scope specified in the claims.

The present application is based on and claims priority from Japanese Patent Application No. 2019-135552 , which was filed with the Japan Patent Office on Jul. 23, 2019, the entire contents of which are incorporated by reference.

Reference List

10

Laminated glass

11:12

glass plate

13,131,132,133

interlayer

14

shielding layer

15

Planar light emitting device

100

vehicle

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• JP 6065221 [0064]
• WO 2015/088026 [0091]
• JP 2019135552 [0119]

Claims (17)

Laminated glass for a vehicle, the laminated glass comprising: a vehicle-inside glass panel; a vehicle outside glass panel; an interlayer connecting the vehicle-inside glass panel and the vehicle-outside glass panel; and at least one planar light-emitting device encapsulated in the intermediate film, wherein the planar light-emitting device emits light of a predetermined color through the vehicle-outside glass panel to the outside of the vehicle, wherein the intermediate sheet comprises a first intermediate sheet to be bonded to the vehicle-inside glass panel, a second intermediate sheet to be bonded to the vehicle-outside glass panel, a third intermediate sheet to be sandwiched between the first intermediate sheet and the second intermediate sheet, and an edge portion of the planar surrounding light-emitting device, and wherein a visible light transmittance of the vehicle inside glass panel, the first intermediate sheet, or both is 70% or less. Laminated glass after claim 1 , where the default color is any of red, white, blue, and yellow. Laminated glass after claim 1 or 2 wherein the planar light emitting device comprises a light source of any of an organic EL light source, an inorganic EL light source and a light emitting diode. Laminated glass according to any of Claims 1 until 3 wherein a visible light transmittance of the vehicle inside glass panel is 70% or less, and a visible light transmittance of the first intermediate sheet is greater than 70%. Laminated glass according to any of Claims 1 until 3 wherein a visible light transmittance of the first intermediate sheet is 70% or less, and wherein a visible light transmittance of the vehicle inside glass panel is greater than 70%. Laminated glass according to any of Claims 1 until 5 , wherein a visible light transmittance of the third intermediate film is 70% or less. Laminated glass according to any of Claims 1 until 6 wherein a shielding layer is formed on an edge portion of a vehicle-inside surface of the vehicle-outside glass panel, and an edge portion of the planar light-emitting device overlaps with the shielding layer in a plan view. Laminated glass after claim 7 wherein at least a portion of the edge portion of the planar light-emitting device is provided closer to a vehicle interior than the shielding layer is to the vehicle interior. Laminated glass according to any of Claims 1 until 8th wherein the vehicle-inside glass panel and the vehicle-outside glass panel have curved shapes. Laminated glass according to any of Claims 1 until 9 , wherein a ratio of an area of the planar light-emitting device to an area of the laminated glass is 1% or more and 95% or less of the area of the laminated glass. Laminated glass after claim 10 , wherein the ratio of the area of the planar light-emitting device to the area of the laminated glass is 1% or more and 20% or less. Laminated glass according to any of Claims 1 until 11 wherein the laminated glass is mounted below a rear window of the vehicle. Laminated glass according to any of Claims 1 until 12 , wherein a mounting angle of the laminated glass with respect to a floor surface when the laminated glass is mounted on the vehicle is 50° or more. Laminated glass according to any of Claims 1 until 13 wherein a maximum value of a visible light transmittance of the laminated glass is 5% or more and 45% or less in a region overlapping with the planar light-emitting device. Laminated glass according to any of Claims 1 until 14 , wherein a proportion of the brightness of light emitted from the vehicle-inside glass panel, the light emitted from the planar light-emitting device, to a sum of the brightness of light emitted from the vehicle-inside glass panel and the brightness of light radiated from the vehicle-outside glass panel of the light emitted from the planar light-emitting device is 10% or less. Laminated glass according to any of Claims 1 until 15 wherein the laminated glass comprises at least one side, and wherein the planar light emitting device is located proximate to a side of the laminated glass. Laminated glass according to any of Claims 1 until 16 wherein the laminated glass comprises at least two opposite sides, and wherein the planar light-emitting device is two light-emitting devices located near one side of the laminated glass, or each of the two planar light-emitting devices near one located on the other of the opposite two sides.

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