JP6426906B2 - Intermediate film for laminated glass, laminated glass, and display device - Google Patents

Description

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

Laminated glass is safe as it is less likely to scatter splinters of glass even if it receives external impact, so it can be used as the windshield, side glass, rear glass, window glass of aircraft, buildings, etc. It is widely used. As a laminated glass, for example, an intermediate film for laminated glass containing a liquid plasticizer and a polyvinyl acetal resin is interposed between at least a pair of glasses, and laminated glass and the like are integrated.

In recent years, with regard to windshields for automobiles, there has been a growing demand to display instrument displays such as speed information, which is vehicle travel data, as a head-up display (HUD) within the same field of view as the windshields.
A number of forms of HUD have been developed so far. By reflecting the speed information etc. transmitted from the control unit as the most common HUD from the display unit of the instrumental panel to the windshield, the driver can find speed information at the same position as the windshield, ie, in the same visual field There is HUD which can visually recognize etc.

As an interlayer film for laminated glass for HUD, for example, an interlayer film for wedge-shaped laminated glass having a predetermined depression angle is proposed in Patent Document 1, for example. It has been proposed to solve the drawbacks.
The laminated glass described in Patent Document 1 can solve the disadvantage of HUD in which the instrument display looks double if it is a partial area in the plane of the laminated glass. That is, the problem of double visibility of the instrument display over 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 by being irradiated with a light beam. However, the laminated glass described in Patent Document 2 has a problem that only a single-color image can be displayed.

Japanese Patent Publication No. 4-502525 International Publication No. 2010/139889 brochure

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

The present invention is an intermediate film for laminated glass having a light emitting layer containing a polyvinyl acetal, a plasticizer and a light emitting material, wherein the light emitting material is a group consisting of a blue light emitting material, a green light emitting material and a red light emitting material The blue-based light emitting material, the green-based light emitting material, and the red-based light emitting material are intermediate films for laminated glass having different excitation wavelengths.
The present invention will be 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 acetals as needed.
The lower limit of the degree of acetalization of the polyvinyl acetal is preferably 40 mol%, preferably 85 mol%, more preferably 60 mol%, and still more preferably 75 mol%.

The lower limit of the amount of hydroxyl groups is preferably 15 mol%, and the upper limit is preferably 35 mol%. When the amount of hydroxyl groups is 15 mol% or more, the formation of the intermediate film for laminated glass is facilitated. When the amount of hydroxyl groups is 35 mol% or less, handling of the interlayer for laminated glass is facilitated.
In addition, the said degree of acetalization and the amount of hydroxyl groups can be measured based on JISK6728 "the polyvinyl butyral test method", for example.

The polyvinyl acetal can be prepared by acetalizing polyvinyl alcohol with an aldehyde. The polyvinyl alcohol is generally 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. The penetration resistance of the laminated glass obtained as the polymerization degree of the said polyvinyl alcohol is 500 or more becomes high. When the degree of polymerization of the polyvinyl alcohol is 4000 or less, the formation of the intermediate film for laminated glass is facilitated. The more preferable lower limit of the polymerization degree of the polyvinyl alcohol is 1000, and the more preferable upper limit is 3600.

Although the said aldehyde is not specifically limited, Generally, a C1-C10 aldehyde is used suitably. 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-nonyl aldehyde , N-decyl aldehyde, formaldehyde, acetaldehyde, benzaldehyde and the like. Among them, n-butyraldehyde, n-hexyl aldehyde 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, etc. Can be 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, tripropylene glycol and the like, butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptylic acid, n-octylic acid The glycol ester etc. which were obtained by reaction with monobasic organic acids, such as an acid, 2-ethylhexyl acid, pelargonic acid (n-nonyl acid), a decyl acid, etc. are mentioned. Among them, triethylene glycol dicaproic acid ester, triethylene glycol di-2-ethylbutyric acid ester, triethylene glycol di-n-octylic acid ester, triethylene glycol di-2-ethylhexylic acid ester and the like are preferable.

The above polybasic organic acid ester is not particularly limited, but, for example, an ester compound of a polybasic organic acid such as adipic acid, sebacic acid, azelaic acid and an alcohol having a linear or branched structure having 4 to 8 carbon atoms Can be mentioned. Among them, dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate and the like are preferable.

The organic ester plasticizer is not particularly limited, and triethylene glycol di-2-ethyl butyrate, triethylene glycol di-2-ethyl hexanoate, 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 ester 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- -Ethylhexanoate, dipropylene glycol di-2-ethyl butyrate, triethylene glycol di-2-ethyl pentanoate, tetraethylene glycol di-2-ethyl butyrate, diethylene glycol dicaprylate, dihexyl adipate, adipine Dioctyl acid, hexyl cyclohexyl adipate, diisononyl adipate, heptyl nonyl adipate, heptyl nonyl adipate, dibutyl sebacate, oil modified sebacic acid alkyd, mixture of phosphoric acid ester and adipic acid ester, adipic acid ester, C 4-9 alkyl alcohol 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 organic phosphoric acid plasticizer is not particularly limited, and examples thereof include tributoxyethyl phosphate, isodecyl phenyl phosphate, triisopropyl phosphate and the like.

Among the above-mentioned plasticizers, dihexyl adipate (DHA), triethylene glycol di-2-ethyl hexanoate (3GO), tetraethylene glycol di-2-ethyl hexanoate (4 GO), triethylene glycol di-2- It is selected from the group consisting of ethyl butyrate (3GH), tetraethylene glycol di-2-ethyl butyrate (4GH), tetraethylene glycol di-n-heptanoate (4G7) and triethylene glycol di-n-heptanoate (3G7) Preferably, it is at least one of

Furthermore, as the above-mentioned plasticizer, since it is hard to cause hydrolysis, triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethyl butyrate (3GH), tetraethylene glycol di-2- It is preferable to contain ethyl hexanoate (4GO), dihexyl adipate (DHA), tetraethylene glycol di-2-ethyl hexanoate (4GO), triethylene glycol di-2-ethyl hexanoate (3GO) It is more preferable to contain, and it is further preferable to contain triethylene glycol di-2-ethylhexanoate.

The content of the plasticizer in the light emitting layer is not particularly limited, but a preferable lower limit is 20 parts by weight and a preferable upper limit is 80 parts by weight with respect to 100 parts by weight of the polyvinyl acetal. When the content of the plasticizer is 20 parts by weight or more, the melt viscosity of the interlayer for laminated glass is low, so the interlayer 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 is increased. The lower limit of the content of the plasticizer is more preferably 30 parts by weight, more preferably 70 parts by weight, still more preferably 35 parts by weight, and still more preferably 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. This enables multicolor image display.
In the present specification, a blue light emitting material means a light emitting material which emits light in a wavelength range of 380 nm or more and less than 495 nm by irradiating a light beam of excitation wavelength, and a green light emitting material means a light beam of excitation wavelength Means a light emitting material that emits light in the wavelength range of 495 nm or more and less than 590 nm by emitting a light, and a red light emitting material means light in a wavelength range of 590 nm or more and 750 nm or less by irradiating a light beam of excitation wavelength. Means a light emitting material that emits light.

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-phenanth) Lollinate) iridium (III) (excitation wavelength 405 nm), tris (2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthrolinate) iridium (III) hexafluorophosphate trisalt (excitation wavelength 405 nm) and the like.

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 (trifluoroacetylacetonato) mono (1,10-phenanthrolinate) 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) (manufactured by Central Techno Co., Ltd., excitation wavelength 340 nm), tris [4,4,4-trifluoro-1- (2-thienyl) -1,3-butanedionato-O, O ′] (benzoic acid) europium (benzoic acid) Central Techno, Inc., excitation wavelength 340 nm), tris [1,1,5,5,5-hexafluoro-1,3-pentanedionato-O, O ′] bis (triphenylphosphine oxide-O-) europium (central Techno, Inc., excitation wavelength 340 nm), tris (trifluoroacetylacetonato) mono (1,10-phenanthrolinate) 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 types of light emitting materials selected from the above group, materials having different excitation wavelengths are used. In this way, it is possible to perform display of the corresponding color by irradiating the light beam of each excitation wavelength, and to perform multicolor image display by irradiating the light beams of a plurality of wavelengths in combination.

The preferable lower limit of the content of each light emitting material alone with respect to 100 parts by weight of the polyvinyl acetal in the light emitting layer is 0.005 parts by weight, and the preferable upper limit is 2 parts by weight. When the content of each light emitting material alone is 0.005 parts by weight or more, an image with higher contrast can be displayed by being irradiated with a light beam. The transparency of the intermediate film for laminated glass is further enhanced when the content of each light emitting material alone is 2 parts by weight or less.

The preferable lower limit of the total content of the light emitting material to 100 parts by weight of the polyvinyl acetal in the light emitting layer is 0.015 parts by weight, and the preferable upper limit is 2 parts by weight. When the total content of the light emitting materials is 0.015 parts by weight or more, an image with a still higher contrast can be displayed by being irradiated with a light beam. The transparency of the intermediate film for laminated glass is further enhanced when the total content of the light emitting materials is 2 parts by weight or less.

The light emitting layer preferably further contains a dispersant. By containing a dispersing agent, 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 linear alkyl benzene sulfonate, an ester structure such as a diester compound, ricinoleic acid alkyl ester, phthalic acid ester, adipic acid ester, sebacic acid ester, 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 and dimethyllauryl Compounds having an amine structure such as amine, oleyl propylene diamine, secondary amine of polyoxyethylene, tertiary amine of polyoxyethylene, diamine of polyoxyethylene and the like, and polyalkylene polyamine alkylene oxide Dispersing agents such as compounds having a polyamine structure such as doe or the like, compounds having an amide structure such as oleic acid diethanolamide and alkanol fatty acid amide, and compounds having a high molecular weight type amide structure such as polyvinyl pyrrolidone and polyester acid amide amine salt It can be used. In addition, high molecular weight dispersants such as polyoxyethylene alkyl ether phosphoric acid (salt), high molecular weight polycarboxylic acid, condensed ricinoleic acid ester may be used. The high molecular weight dispersant is defined as a dispersant whose molecular weight is 10,000 or more.

When the dispersing agent is blended, the preferable lower limit of the content of the dispersing agent to 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 in this range, the light emitting material can be uniformly dispersed in the light emitting layer. A more preferable lower limit of the content of the dispersant is 3 parts by weight, a more preferable upper limit is 30 parts by weight, a more preferable lower limit is 5 parts by weight, and a still more preferable upper limit is 25 parts by weight.

The light emitting layer preferably further contains an ultraviolet absorber. The light resistance of the light emitting layer is enhanced by containing the ultraviolet absorber.
Examples of the UV absorber include a compound having a malonic acid 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 An ultraviolet absorber such as a compound having a structure may be mentioned.

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

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 above-mentioned antioxidant include antioxidants having a phenol structure, antioxidants containing sulfur, and antioxidants containing phosphorus.
The antioxidant having the above phenolic structure is, for example, 2,6-di-t-butyl-p-cresol (BHT), butylated hydroxyanisole (BHA), 2,6-di-t-butyl-4-ethyl Phenol, stearyl-β- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 2,2′-methylenebis- (4-methyl-6-butylphenol), 2,2′-methylenebis- (4 -Ethyl-6-tert-butylphenol), 4,4'-butylidene-bis- (3-methyl-6-tert-butylphenol), 1,1,3-tris- (2-methyl-hydroxy-5-tert-) Butylphenyl) butane, tetrakis [methylene-3- (3 ′, 5′-butyl-4-hydroxyphenyl) propionate] methane, 1,3,3-tris- (2-methyl-4) -Hydroxy-5-tert-butylphenol) butane, 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, and bis (3,3 Examples thereof include '-t-butylphenol) butyric acid glycol ester and pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate]. The said antioxidant may be used independently and may use 2 or more types together.

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

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 a sufficiently high contrast can be obtained when irradiated with a light beam of a specific wavelength. 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 for laminated glass, or may be disposed on a part thereof, and is disposed on the entire surface in the direction perpendicular to the thickness direction of the interlayer for laminated glass. It may be arranged, or may be arranged only in part. In the case where the light emitting layer is disposed only in a part, it is possible to display information only in the light emitting area, with the part as the light emitting area and the other part as the non-light emitting area.

The interlayer for laminated glass of the present invention may be a single layer interlayer including only the above-mentioned light emitting layer, and the above light emitting layer and a resin layer exhibiting other functions, such as an ultraviolet absorbing layer, a heat ray absorbing layer, It may be a multilayer intermediate film including a sound insulation layer or the like.
Further, it is also preferable to laminate a light absorbing layer containing a light absorbing agent that absorbs a light beam of a wavelength that excites the light emitting material contained in the light emitting layer. By laminating such a light absorption layer, it is possible to prevent the light beam irradiated for image display from leaking to the outside.

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 of the present invention.
The said glass plate can use the transparent plate glass generally used. For example, inorganic glass such as float sheet glass, polished sheet glass, template sheet glass, netted glass, lined sheet glass, colored sheet glass, heat ray absorbing glass, heat ray reflecting glass, green glass and the like can be mentioned. Moreover, although the ultraviolet shielding glass by which the ultraviolet-ray shielding coating layer was formed in the surface of glass can also be used, it is preferable to use as a glass plate opposite to the side which irradiates the light ray of a specific wavelength. Furthermore, organic plastic plates such as polyethylene terephthalate, polycarbonate and polyacrylate can also 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 perform display of the corresponding color by irradiation with light beams of the respective excitation wavelengths of the light emitting materials, and a multicolor image can be obtained by combining and irradiating light beams of a plurality of wavelengths. Can be displayed.
The device for irradiating the light beam of the excitation wavelength of each of the above-mentioned light emitting materials is preferably a generation device of a laser type concentrated light beam (laser beam). An image of higher contrast can be displayed by using such a laser beam generator.
A display device comprising the laminated glass of the present invention and at least one laser beam generator, wherein a multicolor image is displayed by irradiating the laser beam from the laser beam generator toward the laminated glass is also the present invention. It is one of the

The laser beam generator preferably has at least one laser diode capable of emitting an ultraviolet laser beam having a wavelength of less than 410 nm.
It is preferable that the above-mentioned laser beam generator has an illuminance adjusting means of the laser beam. Thereby, the brightness of the multi-color image to be displayed can be adjusted according to the external conditions such as day and night.

The laser beam generator may be, for example, a spot light source (for example, "LC-8" manufactured by Hamamatsu Photonics KK), a xenon flash lamp (for example, "CW lamp" manufactured by Heraeus or "REX-250" manufactured by Asahi Spectroscope) Black light (for example, "Carey hand" manufactured by Iuchi Moriido Co., Ltd.) and the like can be mentioned.

According to the present invention, an interlayer for laminated glass capable of displaying a high contrast multi-color image by irradiating excitation light, a laminated glass containing the interlayer for laminated glass, and the laminated glass A display device can be provided.

EXAMPLES The embodiments of the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples.

Example 1
Polyvinyl butyral (acetyl group weight 0.9 mol%, hydroxyl group content 30.6 mol%, butyralization degree 68.5 mol% obtained by acetalizing polyvinyl alcohol having a polymerization degree of 1700 with n-butyraldehyde 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) with respect to 100 parts by weight, 0.2 parts by weight of naphthalimide 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) as a luminescent material 0.2 parts by weight, Inc.) and 0.20 parts by weight of Tinuvin 326 (manufactured by BASF) as an ultraviolet light 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 resulting composition was extruded by 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 50 mm long × 50 mm wide and 2.5 mm thick transparent float glass plates, and was fixed using a heat-resistant tape so as not to shift, to obtain a laminate. . The obtained laminate was placed in a vacuum bag, and the inside of the vacuum bag was degassed at a reduced pressure of 933.2 hPa at normal temperature. Subsequently, while maintaining the degassing state, the vacuum bag was heated to 100 ° C., and after the temperature reached 100 ° C., it was held for 20 minutes. Thereafter, the vacuum bag was cooled by natural cooling, and it was confirmed that the temperature had dropped to 30 ° C., and the pressure was released to atmospheric pressure.
The laminated glass temporarily pressure-bonded by the vacuum bag method was pressure-bonded for 20 minutes at 135 ° C. and a pressure of 1.2 MPa using an autoclave to obtain laminated glass.

(Examples 2-4, comparative examples 1 and 2)
An interlayer for laminated glass and laminated glass were obtained in the same manner as in Example 1 except that the light emitting material was changed 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 The obtained laminated glass was measured for 300 to 2500 nm transmittance using a recording spectrophotometer ("U4100" manufactured by Hitachi, Ltd.), and in accordance with JIS R 3211 (1998) The visible light transmittance of 380 to 780 nm was calculated.

(2) Evaluation of image display As shown in Table 1 from a High Power xenon light source ("REX-250" manufactured by Asahi Spectroscopic Co., Ltd.) disposed at a position 10 cm away from the surface of laminated glass vertically under a dark room. A laser beam of each wavelength is emitted toward the entire surface of the laminated glass, and a 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 beam. The emission wavelength was measured to 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, according to the laminated glass of the example having the light emitting layer containing at least two light emitting materials selected from the group consisting of blue light emitting material, green light emitting material and red light emitting material, three colors of multicolor I was able to display.

According to the present invention, an interlayer for laminated glass capable of displaying a high contrast multi-color image by irradiating excitation light, a laminated glass containing the interlayer for laminated glass, and the laminated glass A display device can be provided.

Claims (4)

An intermediate 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 intermediate film for laminated glass, wherein the blue light emitting material, the green light emitting material and the red light emitting material have a wavelength of less than 410 nm and have excitation wavelengths different from each other. 2. The interlayer for laminated glass according to claim 1, wherein the total content of the light emitting material is 0.015 to 2 parts by weight with respect to 100 parts by weight of polyvinyl acetal. A laminated glass characterized in that the intermediate film for laminated glass according to claim 1 or 2 is laminated between a pair of glass plates. A laminated glass according to claim 3 and at least one laser beam generator, wherein a multicolor image is displayed by irradiating the laser beam from the laser beam generator to the laminated glass. And a display device.