JP2015196618A - Glass laminate interlayer film, glass laminate, and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass laminate interlayer film that can display a high contrast multi-color image when irradiated with an exciting beam; and to provide a glass laminate comprising said glass laminate interlayer film, and a display device using said glass laminate.SOLUTION: Provided is a glass laminate interlayer film comprising a luminous layer that comprises polyvinyl acetal, plasticizer and luminescent material, and in which said luminescent material is one containing at least two kinds selected from the group consisting of blue light-emitting materials, green light-emitting materials and red light-emitting materials, and said blue light-emitting materials, green light-emitting materials and red light-emitting materials are ones that have a mutually different excitation wavelength.

Description

The present invention relates to an interlayer film for laminated glass capable of displaying a high-contrast multicolor image by irradiating excitation light, a laminated glass including the interlayer film for laminated glass, and a display device using the laminated glass. About.

Laminated glass is safe because it does not scatter glass fragments even if it is damaged by an external impact, so it can be used as a windshield, side glass, rear glass for vehicles such as automobiles, and window glass for aircraft, buildings, etc. Widely used. Examples of the laminated glass include a laminated glass obtained by integrating an interlayer film for laminated glass including a liquid plasticizer and a polyvinyl acetal resin between at least a pair of glasses.

2. Description of the Related Art In recent years, there has been a growing demand for a windshield for an automobile to display an instrument display such as speed information, which is automobile travel data, as a head-up display (HUD) within the same field of view as the windshield.
A number of forms have been developed as HUDs so far. By reflecting the speed information transmitted from the control unit as the most common HUD to the windshield from the display unit of the instrument panel, the driver can obtain the speed information at the same position as the windshield, that is, within the same field of view. There is a HUD that can be visually recognized.

As an interlayer film for laminated glass for HUD, for example, Patent Document 1 proposes an interlayer film for wedge-shaped laminated glass having a predetermined wedge angle, and HUD's that the instrument display looks double in laminated glass. It has been proposed to solve the drawbacks.
If the laminated glass described in patent document 1 is a partial area | region in the surface of a laminated glass, the fault of HUD that an instrument display looks double can be solved. That is, the problem that the instrument display appears double on the entire surface of the laminated glass has not been solved.

Patent Document 2 discloses a laminated glass in which an intermediate layer containing hydroxyterephthalate is laminated between two transparent plates. The laminated glass described in Patent Document 2 can display an image with high contrast when irradiated with light. However, the laminated glass described in Patent Document 2 has a problem that only a single color image can be displayed.

Japanese National Publication No. 4-502525 International Publication No. 2010/139889 Pamphlet

The present invention relates to an interlayer film for laminated glass capable of displaying a high-contrast multicolor image by irradiating excitation light, a laminated glass including the interlayer film for laminated glass, and a display device using the laminated glass. The purpose is to provide.

The present invention is an interlayer film for laminated glass having a light emitting layer containing polyvinyl acetal, a plasticizer and a light emitting material, wherein the light emitting material is selected from the group consisting of a blue light emitting material, a green light emitting material and a red light emitting material. The blue light emitting material, the green light emitting material, and the red light emitting material are interlayer films for laminated glass having different excitation wavelengths.
The present invention is described in detail below.

The interlayer film for laminated glass of the present invention has a light emitting layer containing polyvinyl acetal, a plasticizer, and a light emitting material.
The polyvinyl acetal is not particularly limited as long as it is a polyvinyl acetal obtained by acetalizing polyvinyl alcohol with an aldehyde, but polyvinyl butyral is preferable. Moreover, you may use together 2 or more types of polyvinyl acetal as needed.
The preferable lower limit of the degree of acetalization of the polyvinyl acetal is 40 mol%, the preferable upper limit is 85 mol%, the more preferable lower limit is 60 mol%, and the more preferable upper limit is 75 mol%.

The polyvinyl acetal has a preferred lower limit of the hydroxyl group content of 15 mol% and a preferred upper limit of 35 mol%. When the hydroxyl group amount is 15 mol% or more, the interlayer film for laminated glass can be easily molded. When the hydroxyl group amount is 35 mol% or less, handling of the interlayer film for laminated glass becomes easy.
The degree of acetalization and the amount of hydroxyl groups can be measured in accordance with, for example, JIS K6728 “Testing method for polyvinyl butyral”.

The polyvinyl acetal can be prepared by acetalizing polyvinyl alcohol with an aldehyde. The polyvinyl alcohol is usually obtained by saponifying polyvinyl acetate, and polyvinyl alcohol having a saponification degree of 70 to 99.8 mol% is generally used.
The preferable lower limit of the polymerization degree of the polyvinyl alcohol is 500, and the preferable upper limit is 4000. When the polymerization degree of the polyvinyl alcohol is 500 or more, the penetration resistance of the obtained laminated glass is increased. When the polymerization degree of the polyvinyl alcohol is 4000 or less, the interlayer film for laminated glass can be easily molded. The minimum with a more preferable polymerization degree of the said polyvinyl alcohol is 1000, and a more preferable upper limit is 3600.

The aldehyde is not particularly limited, but generally an aldehyde having 1 to 10 carbon atoms is preferably used. The aldehyde having 1 to 10 carbon atoms is not particularly limited. For example, n-butyraldehyde, isobutyraldehyde, n-valeraldehyde, 2-ethylbutyraldehyde, n-hexylaldehyde, n-octylaldehyde, n-nonylaldehyde N-decylaldehyde, formaldehyde, acetaldehyde, benzaldehyde and the like. Of these, n-butyraldehyde, n-hexylaldehyde, and n-valeraldehyde are preferable, and n-butyraldehyde is more preferable. These aldehydes may be used alone or in combination of two or more.

The light emitting layer contains a plasticizer. The plasticizer is not particularly limited, and examples thereof include organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, phosphoric acid plasticizers such as organic phosphoric acid plasticizers and organic phosphorous acid plasticizers, and the like. Is mentioned. The plasticizer is preferably a liquid plasticizer.

The monobasic organic acid ester is not particularly limited. For example, glycols such as triethylene glycol, tetraethylene glycol, and tripropylene glycol, butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptylic acid, and n-octyl Examples thereof include glycol esters obtained by reaction with monobasic organic acids such as acid, 2-ethylhexyl acid, pelargonic acid (n-nonyl acid), and decyl acid. Of these, triethylene glycol dicaproate, triethylene glycol di-2-ethylbutyrate, triethylene glycol di-n-octylate, triethylene glycol di-2-ethylhexylate and the like are preferable.

Although the said polybasic organic acid ester is not specifically limited, For example, ester compound of polybasic organic acid, such as adipic acid, sebacic acid, azelaic acid, and the alcohol which has a C4-C8 linear or branched structure Is mentioned. Of these, dibutyl sebacic acid ester, dioctyl azelaic acid ester, dibutyl carbitol adipic acid ester and the like are preferable.

The organic ester plasticizer is not particularly limited, and triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexanoate, triethylene glycol dicaprylate, triethylene glycol di-n-octanoate, Triethylene glycol di-n-heptanoate, tetraethylene glycol di-n-heptanoate, tetraethylene glycol di-2-ethylhexanoate, dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate, ethylene glycol di-2-ethyl Butyrate, 1,3-propylene glycol di-2-ethyl butyrate, 1,4-butylene glycol di-2-ethyl butyrate, diethylene glycol di-2-ethyl butyrate, diethylene glycol di- -Ethyl hexanoate, dipropylene glycol di-2-ethyl butyrate, triethylene glycol di-2-ethyl pentanoate, tetraethylene glycol di-2-ethyl butyrate, diethylene glycol dicapryate, dihexyl adipate, adipine Dioctyl acid, hexyl cyclohexyl adipate, diisononyl adipate, heptylnonyl adipate, dibutyl sebacate, oil-modified sebacic acid alkyd, a mixture of phosphate ester and adipic acid ester, adipic acid ester, alkyl alcohol having 4 to 9 carbon atoms and Examples thereof include mixed adipic acid esters prepared from cyclic alcohols having 4 to 9 carbon atoms and adipic acid esters having 6 to 8 carbon atoms such as hexyl adipate.

The organophosphate plasticizer is not particularly limited, and examples thereof include tributoxyethyl phosphate, isodecylphenyl phosphate, triisopropyl phosphate, and the like.

Among the above plasticizers, dihexyl adipate (DHA), triethylene glycol di-2-ethylhexanoate (3GO), tetraethylene glycol di-2-ethylhexanoate (4GO), triethylene glycol di-2- Selected from the group consisting of ethyl butyrate (3GH), tetraethylene glycol di-2-ethylbutyrate (4GH), tetraethylene glycol di-n-heptanoate (4G7) and triethylene glycol di-n-heptanoate (3G7) It is preferable that it is at least one kind.

Furthermore, since it is difficult to cause hydrolysis as the plasticizer, triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH), tetraethylene glycol di-2- It preferably contains ethyl hexanoate (4GO) and dihexyl adipate (DHA), and tetraethylene glycol di-2-ethylhexanoate (4GO) and triethylene glycol di-2-ethylhexanoate (3GO). More preferably, it contains triethylene glycol di-2-ethylhexanoate, and even more preferably.

The content of the plasticizer in the light emitting layer is not particularly limited, but a preferable lower limit with respect to 100 parts by weight of the polyvinyl acetal is 20 parts by weight, and a preferable upper limit is 80 parts by weight. When the content of the plasticizer is 20 parts by weight or more, the melt viscosity of the interlayer film for laminated glass becomes low, so that the interlayer film for laminated glass can be easily formed. When the content of the plasticizer is 80 parts by weight or less, the transparency of the interlayer film for laminated glass increases. The more preferred lower limit of the plasticizer content is 30 parts by weight, the more preferred upper limit is 70 parts by weight, the still more preferred lower limit is 35 parts by weight, and the still more preferred upper limit is 63 parts by weight.

The light emitting layer contains a light emitting material.
The light emitting material contains at least two selected from the group consisting of a blue light emitting material, a green light emitting material, and a red light emitting material. As a result, multicolor image display is possible.
In this specification, a blue light-emitting material means a light-emitting material that emits light in a wavelength region of 380 nm or more and less than 495 nm by irradiating light with an excitation wavelength, and a green light-emitting material means a light with an excitation wavelength. Means a light emitting material that emits light in a wavelength range of 495 nm or more and less than 590 nm, and a red light emitting material means light in a wavelength range of 590 nm or more and 750 nm or less by irradiating light of an excitation wavelength. Means a luminescent material.

Examples of the blue light emitting material include naphthalimide materials (for example, “Violet 570” manufactured by BASF, excitation wavelength 405 nm), 4,4′-bis (2-benzoxazolyl) stilbene (manufactured by Central Techno Co., Ltd.) B-800 ", excitation wavelength 405 nm), diethyl 2,5-dihydroxyterephthalate (manufactured by Aldrich, excitation wavelength, excitation wavelength 405 nm), tris (3,4,7,8-tetramethyl-1,10-phenant Lorinato) iridium (III) (excitation wavelength 405 nm), tris (2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolinato) iridium (III) hexafluorophosphate trisalt (excitation wavelength 405 nm).

Examples of the green light emitting material include 2- (3-oxoindoline-1-ylidene) methylquinoline (“G-3300” manufactured by Central Techno Co., Ltd., excitation wavelength: 380 nm), tris (trifluoroacetylacetonato) terbium (III ) (Excitation wavelength: 380 nm), tris (trifluoroacetylacetonate) mono (1,10-phenanthrolinato) terbium (III) (excitation wavelength: 380 nm), and the like.

The red light emitting material is, for example, tris (4,4,4-trifluoro-1- (2-thienyl) -1,3-butanedionate-O, O ′) bis (triphenylphosphine oxide-O— ) Europium (Central Techno Co., Excitation wavelength 340 nm), Tris [4,4,4-trifluoro-1- (2-thienyl) -1,3-butanedionato-O, O ′] (benzoic acid) europium ( Manufactured by Central Techno Co., Ltd., excitation wavelength 340 nm), tris [1,1,5,5,5-hexafluoro-1,3-pentanedionato-O, O ′] bis (triphenylphosphine oxide-O—) europium (Central Manufactured by Techno, excitation wavelength 340 nm), tris (trifluoroacetylacetonato) mono (1,10-phenanthrolinato) europium (I I) (excitation wavelength 340 nm), tris (hexafluoroacetylacetonate) mono (1,10-phenanthrolinyl diisocyanate) europium (III) (excitation wavelength 340 nm), and the like.

As the two or more light emitting materials selected from the above group, those having different excitation wavelengths are used. Thus, by irradiating light beams having respective excitation wavelengths, it is possible to perform display of corresponding colors, and it is possible to display multicolor images by irradiating light beams having a plurality of wavelengths in combination.

The minimum with preferable content of each luminescent material with respect to 100 weight part of said polyvinyl acetals in the said light emitting layer is 0.005 weight part, and a preferable upper limit is 2 weight part. When the content of each of the light emitting materials alone is 0.005 parts by weight or more, an image with much higher contrast can be displayed by irradiation with light. When the content of each light emitting material alone is 2 parts by weight or less, the transparency of the interlayer film for laminated glass is further enhanced.

The minimum with preferable content of the total of the luminescent material with respect to 100 weight part of said polyvinyl acetals in the said light emitting layer is 0.015 weight part, and a preferable upper limit is 2 weight part. When the total content of the light-emitting materials is 0.015 parts by weight or more, an image with much higher contrast can be displayed by irradiation with light rays. When the total content of the light-emitting materials is 2 parts by weight or less, the transparency of the interlayer film for laminated glass is further increased.

The light emitting layer preferably further contains a dispersant. By containing the dispersant, aggregation of the light emitting material can be suppressed, and more uniform light emission can be obtained.
The dispersant is, for example, a compound having a sulfonic acid structure such as a linear alkylbenzene sulfonate, or an ester structure such as a diester compound, a ricinoleic acid alkyl ester, a phthalic acid ester, an adipic acid ester, a sebacic acid ester, or a phosphoric acid ester. , Compounds having an ether structure such as polyoxyethylene glycol, polyoxypropylene glycol and alkylphenyl-polyoxyethylene-ether, compounds having a carboxylic acid structure such as polycarboxylic acid, laurylamine, dimethyllauryl Compounds having an amine structure such as amines, oleylpropylenediamine, secondary amines of polyoxyethylene, tertiary amines of polyoxyethylene, and diamines of polyoxyethylene, and polyalkylenepolyaminealkyleneoxy Dispersants such as compounds having a polyamine structure such as amides, compounds having an amide structure such as oleic acid diethanolamide and alkanol fatty acid amide, and compounds having a high molecular weight amide structure such as polyvinylpyrrolidone and polyester acid amide amine salts Can be used. Moreover, you may use high molecular weight dispersing agents, such as polyoxyethylene alkyl ether phosphoric acid (salt), high molecular polycarboxylic acid, and condensed ricinoleic acid ester. The high molecular weight dispersant is defined as a dispersant having a molecular weight of 10,000 or more.

When the dispersing agent is blended, the preferable lower limit of the content of the dispersing agent with respect to the total of 100 parts by weight of the light emitting material in the light emitting layer is 1 part by weight, and the preferable upper limit is 50 parts by weight. When the content of the dispersant is within this range, the light emitting material can be uniformly dispersed in the light emitting layer. The more preferable lower limit of the content of the dispersant is 3 parts by weight, the more preferable upper limit is 30 parts by weight, the still more preferable lower limit is 5 parts by weight, and the still more preferable upper limit is 25 parts by weight.

It is preferable that the light emitting layer further contains an ultraviolet absorber. When the light emitting layer contains an ultraviolet absorber, the light resistance of the light emitting layer is increased.
Examples of the ultraviolet absorber include a compound having a malonic ester structure, a compound having an oxalic acid anilide structure, a compound having a benzotriazole structure, a compound having a benzophenone structure, a compound having a triazine structure, a compound having a benzoate structure, and a hindered amine Examples include ultraviolet absorbers such as compounds having a structure.

The upper limit with preferable content of the said ultraviolet absorber with respect to 100 weight part of said polyvinyl acetals in the said light emitting layer is 1 weight part. Within this range, an image with high contrast can be displayed. The upper limit with more preferable content of the said ultraviolet absorber is 0.5 weight part.

The light emitting layer preferably further contains an antioxidant. When the light emitting layer contains an antioxidant, excellent light resistance can be exhibited.
Examples of the antioxidant include an antioxidant having a phenol structure, an antioxidant containing sulfur, and an antioxidant containing phosphorus.
Examples of the antioxidant having the phenol structure include 2,6-di-t-butyl-p-cresol (BHT), butylated hydroxyanisole (BHA), 2,6-di-t-butyl-4-ethyl. Phenol, stearyl-β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 2,2′-methylenebis- (4-methyl-6-butylphenol), 2,2′-methylenebis- (4 -Ethyl-6-t-butylphenol), 4,4'-butylidene-bis- (3-methyl-6-t-butylphenol), 1,1,3-tris- (2-methyl-hydroxy-5-t- Butylphenyl) butane, tetrakis [methylene-3- (3 ′, 5′-butyl-4-hydroxyphenyl) propionate] methane, 1,3,3-tris- (2-methyl-4) -Hydroxy-5-t-butylphenol) butane, 1,3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, and bis (3,3 '-T-butylphenol) butyric acid glycol ester and pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] and the like. The said antioxidant may be used independently and may use 2 or more types together.

The light emitting layer may contain additives such as an adhesive strength adjusting agent, a light stabilizer, an antistatic agent, a blue pigment, a blue dye, a green pigment, and a green dye as necessary.

The preferable lower limit of the thickness of the light emitting layer is 300 μm, and the preferable upper limit is 2000 μm. When the thickness of the light emitting layer is within this range, light emission with sufficiently high contrast can be obtained when a light beam having a specific wavelength is irradiated. The more preferable lower limit of the thickness of the light emitting layer is 350 μm, and the more preferable upper limit is 1000 μm.

The light emitting layer may be disposed on the entire surface of the interlayer film for laminated glass, or may be disposed on only a part thereof, and disposed on the entire surface in a plane direction perpendicular to the thickness direction of the interlayer film for laminated glass. It may be arranged only in part. In the case where the light emitting layer is arranged only in part, information can be displayed only in the light emitting area, with the part as a light emitting area and the other part as a non-light emitting area.

The interlayer film for laminated glass of the present invention may be a single-layer interlayer film including only the light emitting layer, and the light emitting layer and a resin layer exhibiting other functions, for example, an ultraviolet absorbing layer, a heat ray absorbing layer, A multilayer intermediate film including a sound insulating layer or the like may be used.
Moreover, it is also preferable to laminate | stack the light absorption layer containing the light absorber which absorbs the light ray of the wavelength which excites the luminescent material contained in the said light emitting layer. By laminating such a light absorption layer, it is possible to prevent the light irradiated for image display from leaking to the outside.

The laminated glass in which the interlayer film for laminated glass of the present invention is laminated between a pair of glass plates is also one aspect of the present invention.
The said glass plate can use the transparent plate glass generally used. Examples thereof include inorganic glass such as float plate glass, polished plate glass, template glass, netted glass, wire-containing plate glass, colored plate glass, heat ray absorbing glass, heat ray reflecting glass, and green glass. Moreover, although the ultraviolet shielding glass in which the ultraviolet shielding coating layer was formed in the glass surface can be used, it is preferable to use as a glass plate opposite to the side irradiated with the light ray of a specific wavelength. Furthermore, organic glass plates such as polyethylene terephthalate, polycarbonate, and polyacrylate can be used as the glass plate.
Two or more types of glass plates may be used as the glass plate. For example, the laminated glass which laminated | stacked the intermediate film for laminated glasses of this invention between transparent float plate glass and colored glass plates like green glass is mentioned. Moreover, you may use the glass plate from which 2 or more types of thickness differs as said glass plate.

The laminated glass of the present invention can display a corresponding color by irradiating light beams of the respective excitation wavelengths of the light emitting material, and can display a multicolor image by irradiating light beams having a plurality of wavelengths in combination. Can be displayed.
The apparatus for irradiating the light having the respective excitation wavelengths of the light emitting material is preferably a laser type concentrated light (laser light) generator. By using such a laser beam generator, an image with higher contrast can be displayed.
A display device that includes the laminated glass of the present invention and one or more laser beam generators, and displays a multicolor image by irradiating a laser beam from the laser beam generator toward the laminated glass is also the present invention. It is one of.

The laser beam generator preferably includes at least one laser diode capable of irradiating an ultraviolet laser beam having a wavelength of less than 410 nm.
The laser beam generator preferably has a laser beam illuminance adjusting means. Thereby, the brightness | luminance of the multicolor image to display can be adjusted according to external conditions, such as day and night.

The laser beam generator includes, for example, a spot light source (for example, “LC-8” manufactured by Hamamatsu Photonics), a xenon flash lamp (for example, “CW lamp” manufactured by Heraeus Co., Ltd. and “REX-250” manufactured by Asahi Spectroscopic Co., Ltd.), Black light (for example, “Carry Hand” manufactured by Inoue Seieido Co., Ltd.) and the like.

According to the present invention, an interlayer film for laminated glass capable of displaying a high-contrast multicolor image by irradiating excitation light, a laminated glass including the interlayer film for laminated glass, and the laminated glass are used. A display device can be provided.

Hereinafter, embodiments of the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

(Example 1)
Polyvinyl butyral obtained by acetalizing polyvinyl alcohol having a polymerization degree of 1700 with n-butyraldehyde (acetyl group content 0.9 mol%, hydroxyl group content 30.6 mol%, butyralization degree 68.5 mol%) ) 100 parts by weight, 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO), 0.2 parts by weight of a naphthalimide-based material (“Violet 570” manufactured by BASF) as a blue light emitting material, red Tris (4,4,4-trifluoro-1- (2-thienyl) -1,3-butanedionate-O, O ′) bis (triphenylphosphine oxide-O—) europium (Central Techno) Co., Ltd.) 0.2 part by weight, Tinuvin 326 (manufactured by BASF) 0.20 part by weight as an ultraviolet absorber And, H-BHT (manufactured by Sakai Chemical Industry Co., Ltd.) were added 0.20 part by weight as an antioxidant to obtain a composition was thoroughly kneaded in a mixing roll.
The obtained composition was extruded with an extruder to obtain a single-layer interlayer film having an average thickness of 0.76 mm.

The obtained interlayer film was sandwiched between two transparent float glass sheets having a length of 50 mm × width of 50 mm and a thickness of 2.5 mm, and fixed using a heat-resistant tape so as not to be displaced to obtain a laminate. . The obtained laminate was placed in a vacuum bag, and the vacuum bag was degassed at a reduced pressure of 933.2 hPa at room temperature. Subsequently, while maintaining the deaerated state, the vacuum bag was heated to 100 ° C., and held for 20 minutes after the temperature reached 100 ° C. Thereafter, the vacuum bag was cooled by natural cooling, and after confirming that the temperature had dropped to 30 ° C., the pressure was released to atmospheric pressure.
The laminated glass temporarily bonded by the vacuum bag method was pressure bonded for 20 minutes under the conditions of 135 ° C. and a pressure of 1.2 MPa using an autoclave to obtain a laminated glass.

(Examples 2 to 4, Comparative Examples 1 and 2)
An interlayer film for laminated glass and a laminated glass were obtained in the same manner as in Example 1 except that the luminescent material was as shown in Table 1.

(Evaluation)
The obtained laminated glass was evaluated by the following method. The results are shown in Table 1.

(1) Measurement of visible light transmittance About the obtained laminated glass, a 300-2500 nm transmittance | permeability is measured using a self-recording spectrophotometer ("U4100" by Hitachi, Ltd.), and it conforms to JIS R3211 (1998). The visible light transmittance at 380 to 780 nm was calculated.

(2) Evaluation of image display Table 1 shows a high power xenon light source ("REX-250" manufactured by Asahi Spectroscopic Co., Ltd.) placed at a position 10 cm away from the surface of the laminated glass in the dark direction in a dark room. Luminance meter ("SR-3AR" manufactured by Topcon Technohouse Co., Ltd.) placed at a position 35 cm away from the surface of the laminated glass irradiated with the light with a laser beam of each wavelength. ) To measure the emission wavelength and evaluate the color development.

表１より、青色系発光材料、緑色系発光材料及び赤色系発光材料からなる群より選択される少なくとも２種の発光材料を含有する発光層を有する実施例の合わせガラスでは、３色の多色表示を行うことができた。

From Table 1, in the laminated glass of the example having a light emitting layer containing at least two kinds of light emitting materials selected from the group consisting of a blue light emitting material, a green light emitting material and a red light emitting material, three colors of multicolor The display could be done.

According to the present invention, an interlayer film for laminated glass capable of displaying a high-contrast multicolor image by irradiating excitation light, a laminated glass including the interlayer film for laminated glass, and the laminated glass are used. A display device can be provided.

Claims (4)

An interlayer film for laminated glass having a light emitting layer containing polyvinyl acetal, a plasticizer and a light emitting material,
The light emitting material contains at least two selected from the group consisting of a blue light emitting material, a green light emitting material, and a red light emitting material,
The interlayer film for laminated glass, wherein the blue light emitting material, the green light emitting material, and the red light emitting material have different excitation wavelengths. 2. The interlayer film for laminated glass according to claim 1, wherein the total content of the light emitting material with respect to 100 parts by weight of polyvinyl acetal is 0.015 to 2 parts by weight. A laminated glass, wherein the interlayer film for laminated glass according to claim 1 or 2 is laminated between a pair of glass plates. It has a laminated glass of Claim 3, and one or more laser beam generators, A multicolor image is displayed by irradiating a laser beam from the laser beam generator toward the laminated glass. Display device.