CN107083089A

CN107083089A - Light guide plate composition and light guide plate

Info

Publication number: CN107083089A
Application number: CN201710005861.2A
Authority: CN
Inventors: 村里和也; 突廻恵介; 篠田智隆
Original assignee: JSR Corp
Current assignee: JSR Corp
Priority date: 2016-02-12
Filing date: 2017-01-04
Publication date: 2017-08-22
Also published as: TW201803946A; KR20170095126A

Abstract

The present invention provides a kind of light guide plate composition and light guide plate, the light guide plate composition can make can by light, with higher brightness, outgoing is to the light guide plate of light-emitting surface side in heterogeneity, and storage stability is also excellent.The light guide plate composition of the present invention contains light diffusion particle (A) and decentralized medium (B), reflectivity under wavelength 300nm~380nm of the cured film for 10 μm of thickness being made using the light guide plate with composition is that the reflectivity under 0%~50%, wavelength 400nm~800nm is 30%~99%.

Description

Light guide plate composition and light guide plate

Technical field

The present invention relates to a kind of light guide plate composition and it is particularly suitable for the leaded light of edge lighting-type surface illuminating device Plate.

Background technology

Have known to surface illuminating device used in liquid crystal display panel or billboard etc. and light source is configured with planar and passed through Diffuser plate etc. come form the full run-down type of face uniformly light-emitting and light source is configured at light guide plate end face edge lighting-type.

Edge lighting-type surface illuminating device possesses light source and light guide plate.Light guide plate possesses light guide base plate and light diffusion part, comes Light from light source is in light guide plate internal communication, and by being configured at the light diffusion part on light guide base plate surface with planar outgoing.This It is that as described in 1~patent document of patent document 4, the light guide plate containing light diffusion particle is coated with towards light guide base plate to plant light guide plate Light diffusion part is made of composition and is manufactured.

[prior art literature]

[patent document]

[patent document 1] Japanese Patent Laid-Open 09-145937 publications

[patent document 2] Japanese Patent Laid-Open 2010-146771 publications

[patent document 3] Japanese Patent Laid-Open 2012-216528 publications

[patent document 4] Japanese Patent Laid-Open 2012-178345 publications

The content of the invention

[invention problem to be solved]

The further raising of efficiency is required for such a surface illuminating device, and requires following technology：To be supplied from light source to The further efficiency of light of light guide base plate is fully taken out to the light-emitting surface side of light guide base plate well.

Therefore, several embodiments of the present invention provide a kind of light guide plate and used by solving at least a portion of the problem Composition, the light guide plate composition can make can be by light with higher brightness outgoing leading to light-emitting surface side in heterogeneity Tabula rasa, and storage stability is also excellent.

[means to solve the problem]

The present invention be in order to solve at least a portion of the problem and winner, following embodiment or application examples can be used as And realize.

[application examples 1]

One embodiment of the light guide plate composition of the present invention contains light diffusion particle (A) and decentralized medium (B), wherein：

Reflectivity under wavelength 300nm~380nm of the cured film for 10 μm of thickness being made using the composition For 0%~50%, the reflectivity under wavelength 400nm~800nm is 30%~99%.

[application examples 2]

In the light guide plate composition of application examples 1,

(particle becomes value obtained by the standard deviation divided by number average particle size of the particle diameter distribution of the smooth diffusion particle (A) Dynamic coefficient) can be 0.01~0.2.

[application examples 3]

In the light guide plate composition of application examples 1 or application examples 2,

The major diameter (Rmax) of the smooth diffusion particle (A) and the ratio (Rmax/Rmin) of minor axis (Rmin) can for 1.01~ 1.2 scope.

[application examples 4]

Application examples 1 into application examples 3 in the light guide plate composition of any,

The decentralized medium (B) can be used as comprising optical polymerism composition.

[application examples 5]

Application examples 1 into application examples 4 in the light guide plate composition of any,

Free radical scavenger (C) can also be contained.

[application examples 6]

Application examples 1 into application examples 5 in the light guide plate composition of any,

Isothiazoline based compound can also be contained.

[application examples 7]

In one embodiment of the light guide plate of the present invention：

It is using application examples 1 into application examples 6 light guide plate of any with the composition person of being made.

[The effect of invention]

According to the light guide plate composition of the present invention, light diffusion part is formed by being coated with said composition towards light guide base plate, Can make can by light with higher brightness in heterogeneity outgoing to light-emitting surface side light guide plate.In addition, the light guide plate of the present invention It is also excellent with the storage stability of composition.

Brief description of the drawings

Fig. 1 is the cross-sectional conceptual figure of one for representing edge lighting-type surface illuminating device.

Fig. 2 is the plan that the formation of light guide plate has the side of light diffusion part.

Fig. 3 is the explanation figure of the concept of the major diameter and minor axis that schematically show light diffusion particle (A).

Fig. 4 is the explanation figure of the concept of the major diameter and minor axis that schematically show light diffusion particle (A).

Fig. 5 is the explanation figure of the concept of the major diameter and minor axis that schematically show light diffusion particle (A).

Fig. 6 is the explanation figure for the concept for schematically showing irregular particle.

Fig. 7 is the explanation figure for the concept for schematically showing irregular particle.

Fig. 8 is the explanation figure for the concept for schematically showing irregular particle.

Fig. 9 is the explanation figure for the concept for schematically showing irregular particle.

Figure 10 is the explanation figure for the concept for schematically showing irregular particle.

Figure 11 is the explanation figure for the concept for schematically showing irregular particle.

[explanation of symbol]

1：Light guide plate

3：Light source

11：Light guide base plate

12：Light diffusion part

20：Planar light source device

30：Infiltration type image displaying part

40a、40b、40c：Light diffusion particle

50a、50b、50c、50d、50e、50f：Irregular particle

52a、52b、52c、52d、52e、52f：1st smooth diffusion particle

54a、54b、54c、54d、54e、54f：2nd smooth diffusion particle

100：Permeation type visual display unit (liquid crystal display device)

a：Major axis

b：Short axle

c、e：Longest distance

d、f：Most short diameter

Rmax：Major diameter

Rmin：Minor axis

S1、S2：(light guide base plate) exit facet

S3₁、S3₂、S3₃、S3₄：(light guide base plate) end face

Embodiment

Hereinafter, the preferred embodiment of the present invention is described in detail.Furthermore, it is thus understood that the present invention is not only limited In following embodiments, the various modifications example implemented in the range of the purport of the present invention is not changed is also included.Furthermore, institute " (methyl) acrylic acid~" in meaning this specification is to include " acrylic acid~" and " methacrylic acid~" this both concept.Separately Outside, so-called "~(methyl) acrylate " is to include "~acrylate " and "~methacrylate " this both concept.Separately Outside, so-called " (methyl) acryloyl group " is to include " acryloyl group " and " methylacryloyl " this both concept.

Furthermore, in this specification, light diffusion particle (A) is simply used for " (A) composition " sometimes, by decentralized medium (B) simply used for " (B) composition ", free radical scavenger (C) is simply used for " (C compositions) ".

1. light guide plate composition

The light guide plate of present embodiment is to form the light of light guide plate with composition (following, also referred to as " composition ") Diffusion part and the composition used.The light guide plate composition of present embodiment contains light diffusion particle (A) and decentralized medium (B)。

The wavelength 300nm of the cured film for 10 μm of thickness being made using the light guide plate of present embodiment with composition~ Reflectivity under 380nm is that the reflectivity under 0%~50%, wavelength 400nm~800nm is 30%~99%.That is, can be clear and definite： By containing aftermentioned smooth diffusion particle (A) in the cured film, ultraviolet light is readily absorbed by, it is seen that light is easily reflected.

If the reflectivity under wavelength 300nm~380nm of the cured film is the scope, in decentralized medium (B) In the case of comprising optical polymerism composition, because ultraviolet light is readily absorbed by, therefore the hardening of cured film easily becomes good. On the other hand, if the reflectivity under wavelength 400nm~800nm of the cured film is the scope, then, it is seen that light is easily equal Quality reflects, and can effectively suppress brightness disproportionation or colourity because of caused by reflected light uneven.Therefore, according to present embodiment Light guide plate composition, the homogenieity that the face that can make lights is excellent and shows the light guide plate of the good characteristics of luminescence.

The cured film of 10 μm of the thickness can make according to method described in aftermentioned embodiment.In addition, wavelength The reflectivity under reflectivity and wavelength 400nm~800nm under 300nm~380nm is described in embodiment as be described hereinafter, can basis The cured film of 10 μm of the thickness using spectrophotometer to being obtained be measured obtained by reflectance spectrum and obtain.

Hereinafter, the light guide plate of present embodiment is described in detail with the composition that can contain in composition.

1.1. light diffusion particle (A)

As light diffusion particle (A), inorganic particulate or organic filler can be used.As inorganic particulate, preferably using carbon Sour calcium particle, barium sulfate particles, TiO 2 particles etc..As organic filler, hud typed organic filler, hollow is preferably used Special-shaped organic filler of the shape of shape organic filler and aspherical etc..Light diffusion particle (A) used in the present invention can be independent It is used alone or in combination of two or more.

The number average particle size (Dn) of such a smooth diffusion particle (A) light diffusion particle (A) be organic filler in the case of, Preferably 0.3 μm~2 μm, more preferably 0.4 μm~1.8 μm.On the other hand, in the feelings that light diffusion particle (A) is inorganic particulate Under condition, preferably 0.5 μm~3 μm, more preferably 0.8 μm~2.8 μm.The number average particle size (Dn) of light diffusion particle (A) can Determined by using the particle size distribution device using dynamic light scattering method as measuring principle.

So-called " utilizing number average particle size obtained by dynamic light scattering determination ", refers to by using with dynamic light scattering Method for measuring principle particle size distribution device to observe the fluctuation of scattered light intensity, and obtained according to photon correlation method from phase Function is closed, the number average particle size for parsing and obtaining using the Cumulant Method Using and histogram method.

As the particle size distribution device using dynamic light scattering method as measuring principle, it can enumerate：Beckman-Kurt (beckman-coulter) nano-particle analyzer " Dare Sa nanometer (DelsaNano) S ", the Malvern of company's manufacture (Malvern) " Jie Tasijie nanometers of (Zetasizer nano) zs ", the manufactures of great Mound electronics limited company of company's manufacture " Ai Lesi (ELSZ) -1000ZS " etc..

Number average particle size (Dn) is that the inorganic particulate in the scope can be by suitable based on size distribution from commercially available product Preferably select and obtain.In addition, core-shell particles, hollow-particle, irregular particle etc. can using International Publication No. 2005/071014 or Method described in Japanese Patent Laid-Open 2013-93205 publications makes.

Particle coefficient of alteration (the variation lines of contained light diffusion particle (A) in the light guide plate composition of present embodiment Number (coefficient of variation, CV) values) be preferably 0.01~0.2 scope, more preferably 0.02~0.15 Scope.Can be clear and definite：Light must be made to diffuse to light-emitting surface side in heterogeneity in light guide plate, if the particle of light diffusion particle (A) becomes Dynamic coefficient is that in the scope, then the distributed degrees of the particle diameter can form the state for easily making light spread in heterogeneity and reduce light Diffusing reflection.Thus, the light extraction efficiency of light guide plate is improved tremendously.

Furthermore, particle coefficient of alteration (CV values) can be obtained by following formula (1).

The standard deviation (σ) of CV values=particle diameter distribution/number average particle size (Dn) (1)

The major diameter (Rmax) of light diffusion particle (A) and the ratio (Rmax/Rmin) of minor axis (Rmin) are preferably 1.01~1.2 Scope, more preferably 1.02~1.15 scope.If ratio (Rmax/Rmin) is the scope, light diffusion particle (A) The surface of surface area increase and light diffusion particle (A) is changed into the curved surface of simultaneously anon-normal ball, therefore the scattering efficiency of light becomes big, light guide plate Mean flow rate become big.

The major diameter (Rmax) of so-called smooth diffusion particle (A), is referred in the independence shot using transmission electron microscope Light diffusion particle picture in, connect picture end and end straight line in most long straight line distance.So-called smooth diffusion particle (A) Minor axis (Rmin), is referred in the independent light diffusion particle picture shot using transmission electron microscope, connects the end of picture The distance of most short straight line in the straight line of portion and end.

For example, the independent light diffusion particle 40a shot in utilization transmission electron microscope as shown in Figure 3 picture In the case of for elliptical shape, the major axis a of the elliptical shape is judged as to the major diameter (Rmax) of light diffusion particle, by short axle b It is judged as the minor axis (Rmin) of light diffusion particle.As shown in figure 4, in the independent light shot using transmission electron microscope In the case that diffusion particle 40b picture is the agglomerate of two primary particles, by the end for connecting picture and the straight line of end Longest distance c is judged as the major diameter (Rmax) of light diffusion particle, by the most short diameter d in the end for connecting picture and the straight line of end It is judged as the minor axis (Rmin) of light diffusion particle.As shown in figure 5, in the independent light shot using transmission electron microscope In the case of agglomerate of the diffusion particle 40c picture for the primary particle of more than three, by the straight of the end of connection picture and end Longest distance e in line is judged as the major diameter (Rmax) of light diffusion particle, will be most short in the end for connecting picture and the straight line of end Diameter f is judged as the minor axis (Rmin) of light diffusion particle.

The major diameter (Rmax) and minor axis of 20 light diffusion particles (A) can be for example determined by using the judgement gimmick (Rmin) major diameter (Rmax), is calculated with after the average value of minor axis (Rmin), calculating the average value of the major diameter and putting down for minor axis The ratio (Rmax/Rmin) of average and obtain.

In addition, light diffusion particle (A) can be for example, the 1st smooth diffusion particle and the knot of the 2nd smooth diffusion particle contiguity " irregular particle " of structure.In this case, light diffusion particle (A) can be at least the one of the surface of any smooth diffusion particle (A) Part is configured with the structure of another smooth diffusion particle (A).Herein, in this specification, so-called " abnormity " refers to two grains The son central point overall relative to particle is asymmetricly configured.

Fig. 6~Figure 11 is the explanation figure for the concept for schematically showing irregular particle.As " irregular particle ", for example, it can arrange Lift the structure as shown in Fig. 6~Figure 11.

Irregular particle 50a shown in Fig. 6 has：2nd smooth diffusion particle 54a is close contact in the 1st smooth diffusion particle 52a surface A part, and the structure that the 2nd smooth diffusion particle 54a is protruded from the 1st smooth diffusion particle 52a surface.

Irregular particle 50b shown in Fig. 7 has：2nd smooth diffusion particle 54b is completely contained in the 1st smooth diffusion particle 52b's Inside, and the 2nd smooth diffusion particle 54b and the 1st smooth diffusion particle 52b a little connecting for surface and it is overall in substantially spherical knot Structure.

Irregular particle 50c shown in Fig. 8 has：The smooth diffusion particle 54c of 1st smooth diffusion particle 52c and the 2nd touch and entirety In substantially spherical structure.Furthermore, in the irregular particle 50c shown in Fig. 8, the 1st smooth diffusion particle 52c and the 2nd smooth diffusion particle 54c has the surface area of same degree, in this connection, be not particularly limited.

Irregular particle 50d shown in Fig. 9 has：2nd smooth diffusion particle 54d is contained in the interior of the 1st smooth diffusion particle 52d Portion, and the 2nd smooth diffusion particle 54d curved surface is presented on irregular particle 50d surface and overall in substantially spherical structure.

Irregular particle 50e shown in Figure 10 has：Irregular particle 50c as shown in Figure 8 is in integrally the ellipse of American football shape Spherical structure.Furthermore, in the irregular particle 50e shown in Figure 10, the 1st smooth smooth diffusion particle 54e tools of diffusion particle 52e and the 2nd There is the surface area of same degree, in this connection, be not particularly limited.

Irregular particle 50f shown in Figure 11 has：The 1st substantially spherical smooth diffusion particle 52f and the 2nd substantially spherical light Touch and the overall structure spherical in Shuangzi in diffusion particle 54f face.

In the case where irregular particle is organic filler, it is not particularly limited, is preferably by the 1st smooth diffusion particle and the 2nd Two particle constitutors of light diffusion particle.In the case of described, the composition of the composition and the 2nd smooth diffusion particle of the 1st smooth diffusion particle It may be the same or different, at least one and the 2nd smooth diffusion particle of contained single amount body unit in preferably the 1st smooth diffusion particle In contained single amount body unit it is different.That is, in this case, constituting at least one of single amount body unit of special-shaped organic filler only In any smooth diffusion particle for being contained in the 1st smooth diffusion particle and the 2nd smooth diffusion particle.Thus, as shown in Fig. 6~Figure 11, The 1st smooth diffusion particle can be made asymmetricly to be separated with the 2nd smooth diffusion particle.

In the case where light diffusion particle (A) is irregular particle, irregular particle is substantially constituted to the aspect of a particle For, the major diameter and minor axis of such as following measure irregular particle.For example in light diffusion particle (A) to be as shown in Figure 6 with spherical In the case of the substantially spherical particle 50a of projection, major diameter (Rmax) from the 1st smooth diffusion particle 52a end to the 2nd light by expanding Distance untill the sub- 54a of shot end is represented.In addition, minor axis (Rmin) (is the 1st smooth diffusion particle in Fig. 6 by bigger particle Diameter 52a) is represented.

Light diffusion particle (A) be irregular particle, and the irregular particle be organic filler in the case of, such as it is available Described method makes in Japanese Patent Laid-Open 2013-098123 publications etc..In addition, being inorganic particulate in irregular particle In the case of, using method suitable for making known to graded operation after breaking method, crushing etc..

Light diffusion particle (A) with polymerize after aftermentioned optical polymerism composition refringence absolute value | Δ n | be preferably 0.02≤|Δn|≤1.3.For example when using photopolymerization monomer or optical polymerism oligomer as optical polymerism composition, if Use calcium carbonate particle (refractive index：N=1.59), barium sulfate particles (refractive index：N=1.64) and TiO 2 particles (refraction Rate：N=2.7 in) at least any one as light diffusion particle (A), then meet the condition.

The light guide plate of present embodiment is scattered in decentralized medium (B) with composition as described light diffusion particle (A) State.The content of light diffusion particle (A) in the light guide plate composition of present embodiment is inorganic in light diffusion particle (A) In the case of particle, when the gross mass of composition is set into 100 mass %, the mass of preferably 0.5 mass %~20 % is more excellent Elect the mass % of 1 mass %~15 as, the mass % of particularly preferably 3 mass %~12.In addition, being organic in light diffusion particle (A) In the case of particle, when the gross mass of composition is set into 100 mass %, the mass of preferably 0.5 mass %~40 % is more excellent Elect the mass % of 5 mass %~35 as, the mass % of particularly preferably 10 mass %~30.If the content of light diffusion particle (A) is institute Scope is stated, then the storage stability of composition becomes good, and the screening characteristics of composition becomes good, therefore easily in guide-lighting base The surface of plate forms the light diffusion part of homogeneous.

1.2. decentralized medium (B)

The light guide plate composition of present embodiment contains decentralized medium (B).In the light guide plate group using photo-hardening type In the case that compound makes light diffusion part, it is used as decentralized medium (B), it is preferable to use optical polymerism composition.It is poly- by using light Conjunction property composition, can suppress the generation in the space of smooth diffusion part described later, can further suppress to overflow because of caused by the generation in space Reflection.Such a optical polymerism composition is preferably to have the optical polymerism functional groups such as vinyl, it is preferable to use optical polymerism list amount Body or photonasty condensate.As such a composition, for example, International Publication No. 2005/071014 or Japan Patent can be used in good time Compound described in JP 2013-93205 publications.

As optical polymerism list amount body, for example, aromatic ethenyl, unsaturated nitrile, esters of unsaturated carboxylic acids, insatiable hunger can be used With acid amides etc..

As aromatic ethenyl, for example, it can enumerate：Styrene, α-methylstyrene, o-methyl styrene, a methylbenzene Ethene, p-methylstyrene, adjacent ethyl styrene, an ethyl styrene, p -ethyl-styrene, p-tert-butylstyrene, two Vinyl benzene, p-divinyl benzene, a di isopropenylbenzene, to di isopropenylbenzene, ortho-chlorostyrene, m-chlorostyrene, right Chlorostyrene, 1,1- diphenylethlenes, to methoxy styrene, N, N- dimethyl-p-aminophenyl ethene, N, N- diethyl-right Aminostyryl, 2- vinylpyridines, 3- vinylpyridines, 4-vinylpridine etc..

As unsaturated nitrile, for example, it can enumerate：(methyl) acrylonitrile, α-chloro-acrylonitrile, α-chloromethyl propylene nitrile, α-methoxy Base acrylonitrile, α-ethoxy propylene nitrile, butenoic acid nitrile, cinnamic acid nitrile, itaconic acid dintrile, maleic acid dintrile, fumaric acid dintrile etc..

As esters of unsaturated carboxylic acids, for example, it can enumerate：(methyl) acrylate；M Cr, butenoic acid ethyl, butylene The butenoates such as propyl propionate, butyl crotonate；The Chinese cassia trees such as methyl cinnamate, ethyl cinnamate, propyl cinnamate, butyl cinnamate Acid esters etc..It is preferably (methyl) acrylate among these.

As (methyl) acrylate, it can enumerate：(methyl) methyl acrylate, (methyl) ethyl acrylate, (methyl) third Olefin(e) acid n-propyl, (methyl) isopropyl acrylate, (methyl) n-butyl acrylate, (methyl) isobutyl acrylate, (methyl) third The secondary butyl ester of olefin(e) acid, (methyl) tert-butyl acrylate, (methyl) acrylic acid n-pentyl ester, (methyl) n-octyl, (methyl) third Olefin(e) acid 2- ethylhexyls, (methyl) lauryl acrylate, (methyl) stearyl acrylate ester, (methyl) acrylic acid 2- methoxyl group second (methyl) acrylate such as ester, (methyl) acrylic acid 2- ethoxy ethyl esters, (methyl) acrylic acid 2- (positive propoxy) ethyl ester；

(methyl) acrylic acid 2- hydroxy methacrylates, (methyl) acrylic acid 2- hydroxy propyl esters, (methyl) acrylic acid 3- hydroxy propyl esters, (methyl) acrylic acid 4- hydroxybutyls, (methyl) acrylic acid [4- (hydroxymethyl) cyclohexyl] methyl esters, (methyl) acrylic acid 2- hydroxyls (methyl) acrylate of the hydroxyls such as base -3- phenoxy-propyls；(methyl) third of the poly- alkane glycol such as polyethylene glycol, polypropylene glycol Olefin(e) acid monoesters；

(methyl) esters of acrylic acid of the cyano-containings such as (methyl) cyano ethyl acrylate, (methyl) acrylic acid cyanopropyl acrylate； (methyl) acrylic acid 2- phenoxy ethyls, (methyl) acrylic acid 2- phenoxy-propyls, (methyl) acrylic acid 3- phenoxy-propyls etc. (methyl) acrylic acid aryloxy group alkyl base ester；

The alkoxies such as methoxy poly (ethylene glycol), ethyoxyl polyethylene glycol, methoxyl group polypropylene glycol, ethyoxyl polypropylene glycol gather (methyl) acrylic monoester class of alkane glycol；(the first of the poly- alkane glycol of the aryloxy group such as phenoxy group polyethylene glycol, phenoxy group polypropylene glycol Base) acrylic monoester class；The alkane two such as ethylene glycol, propane diols, 1,4- butanediols, 1,5- pentanediols, 1,6-HD, neopentyl glycol (methyl) diester acrylates of alcohol；

(methyl) acrylic acid two of the poly- alkane glycol such as polyethylene glycol, polypropylene glycol (alkane diol units number is, for example, 2~23) Ester, two terminal hydroxyl polybutadiene, two terminal hydroxyl polyisoprene, two terminal hydroxyl hycars, two ends The end of terminal hydroxy group polycaprolactone etc. two has polymeric (methyl) diester acrylates of hydroxyl；

Glycerine, 1,2,4- butantriols, trimethylolalkane (carbon number of alkane is, for example, 1~3), tetra methylol alkane (alkane The carbon number of hydrocarbon is, for example, 1~(methyl) diester acrylates of polyalcohol 3), more than the trivalent of pentaerythrite, (methyl) acrylic acid (methyl) acrylic acid oligomerization ester such as three esters or the ester of (methyl) acrylic acid four；

The ester of (methyl) acrylic acid three or the ester of (methyl) acrylic acid four of the poly- alkane glycol adducts of polyalcohol more than trivalent Deng (methyl) acrylic acid oligomerization ester etc..

As unsaturated amides, for example, it can enumerate：(methyl) acrylamide, N- hydroxymethyls (methyl) acrylamide, N- (2- hydroxyethyls) (methyl) acrylamide, N, N- double (2- hydroxyethyls) (methyl) acrylamide, N, N'- di-2-ethylhexylphosphine oxide (first Base) acrylamide, N,N' ethylene bis (methyl) acrylamide, N, N'- hexamethylene bis (methyl) acrylamide, acryloyl Base morpholine, crotonamide, cinnamamide etc..

As photonasty condensate, as long as to be imported with optical polymerism base person in polymer backbone, then can be not particularly limited Ground uses known person.As such a polymer backbone, polyether skeleton can be enumerated, polyurethane skeleton, polyethylene backbone, poly- Ester skeleton, polyamide backbone, polyimide backbone, polyphenylene skeleton etc., preferably polyether skeleton, polyurethanes bone Frame.As optical polymerism base, for example, it can enumerate (methyl) acryloyl group, alkenyl, cinnamoyl, benzene acrol acetyl group, benzene Methylene-benzene ethyl ketone base, stibazole base, α-phenyl maleimide base, aziminobenzene base, sulfonylazido, carbonyl Azido, two azo groups, o-quinone diazido, furylacryloyl base, cumarin base, pyrans ketone group, anthryl, benzophenone Base, perfume base of resting in peace, diphenylethyllene, dithiocarbamate groups, xanthic acid ester group, 1,2,3- thiadiazolyl groups, cyclopropanyl, Azepine dioxa bicyclic group etc., optical polymerism base preferably is (methyl) acryloyl group and cinnamoyl, particularly preferably (first Base) acryloyl group.

Furthermore, it is used as decentralized medium (B) by adding aliphatic carbamate (methyl) acrylate, can be easily controlled The viscosity or photo-hardening of light guide plate composition.

Decentralized medium (B) used in the present invention can be used alone a kind of or be applied in combination two or more.

In the case where decentralized medium (B) includes optical polymerism composition, when the gross mass of composition is set into 100 mass % When, the light guide plate of present embodiment is preferably the mass % of 50 mass %~95 with the content of the optical polymerism composition in composition, The mass % of more preferably 60 mass %~80.If the content of optical polymerism composition is the scope, sufficiently intensity it can come Keep being formed at light diffusion particle (A) contained in the light diffusion part on the surface of light guide base plate, can effectively suppress manufacturing step Middle smooth diffusion particle (A) is peeled off etc. and produces foreign matter.

1.3. free radical scavenger (C)

The light guide plate composition of present embodiment can also contain free radical scavenger (C).By containing radical-scavenging Agent (C), can effectively prevent light guide plate composition in the polymerization of the optical polymerism composition of memory phase, and can suppress light diffusion The brightness disproportionation or colourity in portion are uneven and improve the luminous homogenieity in the face of light guide plate.

Set when the content of the light diffusion particle (A) in composition is set into Ma mass parts, the content of free radical scavenger (C) During for Mc mass parts, both ratio Ma/Mc are preferably 20~500, and more preferably 30~300.Can be clear and definite：By in the scope Interior use free radical scavenger (C), can effectively prevent light guide plate composition in the poly- of the optical polymerism composition of memory phase Close, and the brightness disproportionation or colourity inequality of light diffusion part can be suppressed and the homogenieity that the face of light guide plate lights further is improved.

By suppressing the brightness disproportionation or colourity inequality of light diffusion part containing free radical scavenger (C) and further improving , can be as considered below though the discovery mechanism of the effect of the luminous homogenieity in the face of light guide plate is indefinite.

When using light guide plate composition, light guide plate is exposed in oxygen containing extraneous air etc. all the time with composition.Example Such as in the case where making light diffusion part using printing, start to print untill terminating in comfortable light guide base plate when needing certain Between.Thereafter, carry out carrying out the light guide plate through printing with composition the cure step of light irradiation etc., and make light diffusion part.This When, the light diffusion part forerunner portion of printing making at initial stage (refers to hardened and printed as the light guide plate before light diffusion part with composition Brush portion) compared to printing at the end of light diffusion part forerunner portion for before cure step for longer periods be exposed to air in. Think the difference of the open-assembly time because of the air, the oxygen amount that light diffusion part forerunner portion absorbs from air produces difference.It is tied Really, thus it is speculated that light guide plate produces certain change with the hardening state of composition in cure step behind.Speculate the hardening shape The difference of state turns into the difference of the light disperse state of each smooth diffusion part, encourages the deterioration of the luminous homogenieity in face of light guide plate.

However, in the case where light guide plate composition contains free radical scavenger (C), even if in the atmospheric exposure time Difference is produced from the oxygen amount of Atmospheric Absorption, as a result, making initial stage in light diffusion part forerunner portion with making later stage each smooth diffusion part Contained oxygen amount produces difference in forerunner portion, and the oxygen radical amount produced in hardening process thereafter by the oxygen absorbed is produced Difference, free radical scavenger (C) can also catch these, and suppress these action.As a result, the group of more homogeneous can be made by speculating Into the hardening of light diffusion part forerunner portion, and can further improve the luminous homogenieity in the face of light guide plate.

As free radical scavenger (C), such as preferably phenol derivatives.By using phenol derivatives, and it is further Improve the whiteness of light diffusion part.As phenol derivatives, for example, it can enumerate：Hydroquinones, hydroquinone monomethyl ether, Dan Shuding Base hydroquinones, catechol, 4- tert-butyl catechols, p methoxy phenol, 2,5- di-t-butyls hydroquinones, 2,6- The hydroxy-aromatic compounds such as di-t-butyl metacresol, pyrogallol, betanaphthol, benzoquinones, 2,5- diphenyl -1,4-benzoquinone, to first Quinone, to stubble quinone (p-xyloquinone) etc..Free radical scavenger (C) used in the present invention can be used alone it is a kind of or It is applied in combination two or more.

When the gross mass of composition is set into 100 mass %, as in the light guide plate composition of present embodiment The content of the phenol derivatives of free radical scavenger (C) is preferably the mass % of 0.001 mass %~2, more preferably 0.01 matter Measure the mass % of %~1 mass %, particularly preferably 0.05 mass %~0.5.If being used as free radical scavenger (C) phenol derivative The content of thing is that in the scope, then can effectively prevent the optical polymerism composition in memory phase of light guide plate composition Polymerization.In addition, can further improve the whiteness of light diffusion part.

1.4. Photoepolymerizationinitiater initiater

The light guide plate composition of present embodiment can also contain Photoepolymerizationinitiater initiater.Particularly it is in decentralized medium (B) In the case of optical polymerism composition, in order to improve photo-hardening, preferably contain Photoepolymerizationinitiater initiater.

As such a Photoepolymerizationinitiater initiater, can suitably it be selected in usual institute user from the field of radioactive ray hardening resin Select, for example, can enumerate International Publication No. 2005/071014 or the change described in Japanese Patent Laid-Open 2013-93205 publications Compound etc..

As the concrete example of Photoepolymerizationinitiater initiater, it can enumerate：α-the diketone such as diacetyl, methyl benzoylformate, benzil Compound；Styrax, new penta acyloin (pivaloin) etc. acyloin (acyloin) class；Benzoin methyl ether, benzoin ethyl ether, rest in peace The acyloin ethers such as fragrant isopropyl ether, benzoin isobutyl ether；The multinuclear quinones such as anthraquinone, 2- EAQs, 2- tert-butyl groups anthraquinone, 1,4- naphthoquinones Class；Acetophenone, 2- hydroxy-2-methyls-propiophenone, 1- hydroxycyclohexylphenylketones, 2,2- dimethoxyphenylacetophenones, 2,2- The acetophenones such as diethoxy acetophenone, trichloroacetophenone；Benzophenone, o-benzoyl yl benzoic acid methyl esters, michaelis ketone etc. two Benzophenone class；The xanthene ketone such as xanthone, thioxanthones, CTX.Photoepolymerizationinitiater initiater used in the present invention can be single Solely it is used alone or in combination of two or more.

When the gross mass of composition is set into 100 mass %, the light in the light guide plate composition of present embodiment gathers The content for closing initiator is preferably the mass % of 0.1 mass %~20, the mass % of more preferably 0.5 mass %~10.If photopolymerization The content of initiator is that in the scope, then in order to improve the photo-hardening of light guide plate composition, can make inviscid (tack-free) light diffusion part.

1.5. other compositions

The light guide plate composition of present embodiment can also contain the composition beyond the composition, such as isothiazoline system Compound, phosphate, surfactant, water, adhesive etc..

＜ isothiazoline based compounds ＞

By adding isothiazoline based compound, isothiazoline system chemical combination in the light guide plate composition of present embodiment Thing is acted as preservative, when store light guide plate composition when, bacterium can be suppressed or it is mould wait breed and produce foreign matter. And then, can be clear and definite：The brightness disproportionation or colourity that light diffusion part can be suppressed are uneven and further improve luminous equal in the face of light guide plate Matter.

By suppressing the brightness disproportionation or colourity inequality of light diffusion part containing isothiazoline based compound and further carrying , can be as considered below though the discovery mechanism of the effect of the luminous homogenieity in the face of high light guide plate is indefinite.When using light guide plate When using composition, light guide plate is exposed in oxygen containing extraneous air etc. all the time with composition.For example light expansion is being made using printing In the case of the portion of dissipating, start printing in comfortable light guide base plate needs the regular hour untill terminating.Thereafter, carry out to through printing Light guide plate the cure step of light irradiation etc. is carried out with composition, and make light diffusion part.Now, the light of printing making at initial stage expands At the end of dissipating forerunner portion of portion (refer to hardened and turn into the light guide plate composition Printing Department before light diffusion part) compared to printing Light diffusion part forerunner portion for before cure step for longer periods be exposed to air in.When thinking the exposure because of the air Between difference, volatile organic matter amount that light diffusion part forerunner portion absorbs from air produces difference.As a result, speculating behind Cure step in light guide plate certain change is produced with the hardening state of composition, the difference of the hardening state turns into the expansion of each light The difference of the light disperse state in the portion of dissipating, encourages the deterioration of the luminous homogenieity in face of light guide plate.

On the other hand, in the light guide plate composition of present embodiment, there is isothiazoline based compound and be adsorbed on Light diffusion particle (A) etc. and the tendency being maintained.As a result, thinking light diffusion particle (A) surface by isothiazoline system chemical combination Thing is protected, and the volatile organic matter that can suppress to absorb from the air is adsorbed in light diffusion particle (A) surface.As a result, i.e. Just initial stage is made with making volatile organic matter volume production contained in later stage each smooth diffusion part forerunner portion in light diffusion part forerunner portion Raw difference, these volatile organic matters will not also be adsorbed in light diffusion particle (A) surface securely.Speculate by the effect, Light diffusion part will not be held in cure step behind and is released again in air, therefore the composition of more homogeneous can be made Light diffusion part forerunner portion is hardened, and can further improve the luminous homogenieity in the face of light guide plate.

As isothiazoline based compound, as long as being the compound with isothiazoline skeleton, then there is no particular restriction, example The compound represented by compound or following formulas (3) as represented by can enumerate following formulas (2).

[changing 1]

In the formula (2), R¹For hydrogen atom or alkyl, R²、R³Separately represent hydrogen atom, halogen atom or hydrocarbon Base.In R¹、R²、R³In the case of for alkyl, can have straight chain or the chain carbon skeleton of branched chain, can also have ring-type carbon skeleton. In addition, the carbon number of alkyl is preferably 1~12, more preferably 1~10, particularly preferably 1~8.As the concrete example of such a alkyl, It can enumerate：Methyl, ethyl, propyl group, isopropyl, butyl, hexyl, cyclohexyl, octyl group, 2- ethylhexyls etc..

[changing 2]

In the formula (3), R⁴For hydrogen atom or alkyl, R⁵Separately represent hydrogen atom or organic group.In R⁴For hydrocarbon In the case of base, the alkyl identical alkyl with explanation in the formula (2) can be enumerated.In addition, in R⁵For the situation of organic group Under, the fatty group or aromatic series base as alkyl or cycloalkyl, preferably fatty group are included in the organic group.Alkyl Carbon number is preferably 1~12, more preferably 1~10, particularly preferably 1~8.These alkyl and cycloalkyl can have halogen atom, The substituents such as alkoxy, dialkyl amido, acyl group, alkoxy carbonyl.As the concrete example of the fatty group, it can enumerate：First Base, ethyl, propyl group, isopropyl, butyl, hexyl, cyclohexyl, octyl group, 2- ethylhexyls etc..In the formula (3), n represents 0~4 Integer.

As the concrete example of isothiazoline based compound, BIT, 2- methyl -4,5- can be enumerated Trimethylene -4- isothiazoline -3- ketone, MIT, CMIT, N- normal-butyl -1,2- benzisothiazole-3-ketones, Kathon, the chloro- 2- n-octyls -4- of 4,5- bis- Isothiazoline -3- ketone etc., can be used these one or more.Among these, preferably 2- methyl -4- isothiazolines - 3- ketone, Kathon, CMIT, 1,2- benzisothiazoles -3- Ketone.

When the gross mass of composition is set into 100 mass %, the different thiophene in the light guide plate composition of present embodiment The content of oxazoline based compound is preferably the mass % of 0.01 mass %~0.5, the mass % of more preferably 0.015 mass %~0.2, The mass % of particularly preferably 0.01 mass %~0.1.By using isothiazoline based compound in the scope, it can improve and lead The storage stability of tabula rasa composition.

In addition, when the content of the light diffusion particle (A) in composition is set into Ma mass parts, isothiazoline based compound When content is set to Md mass parts, both ratio Ma/Md are preferably as 50~600 ratio, more preferably 100~500.Can be bright Really：By using isothiazoline based compound in the scope, the storage stability of light guide plate composition can be improved, and can Suppress the brightness disproportionation or colourity inequality of light diffusion part and further improve the homogenieity that the face of light guide plate lights.

＜ phosphates ＞

By the light guide plate in present embodiment with phosphate is added in composition, light guide base plate and light diffusion part can be improved Adhesion.In addition, can also improve hardness, marresistance and the wear resistance when light guide plate to be made to hardened coating film of composition With the balance of low curling.

As phosphate, the compound shown in preferably following formulas (4).Furthermore, even if poly- equivalent to light in phosphate In the case of conjunction property composition, phosphate and decentralized medium (B) are also considered as heterogeneity in the present application.

[changing 3]

(in formula (4), R⁶Represent hydrogen atom or methyl, R⁷Divalent organic base is represented, n represents 1 or 2 integer).

As phosphate, for example, it can enumerate：Single (2- (methyl) acryloyl-oxyethyl) phosphate or double (2- (methyl) third Alkene trimethylammonium) phosphate, list (2- (methyl) acryloxypropyl) phosphate or double (2- (methyl) acryloxies third Base) phosphate, list (3- (methyl) acryloxypropyl) phosphate or double (3- (methyl) acryloxypropyl) phosphates, Single (6- (methyl) acryloxies hexyl) phosphate or double (6- (methyl) acryloxies hexyl) phosphates, list (10- (first Base) acryloxy decyl) phosphate or double (10- (methyl) acryloxies decyl) phosphates, list (1- chloromethyl -2- (first Base) acryloyl-oxyethyl) phosphate or double (1- chloromethyls -2- (methyl) acryloyl-oxyethyl) phosphates, 2- (methyl) Lactone-modified thing, polyoxy alkylidene modifier of acryloyl-oxyethyl phenyl phosphate ester etc. and these phosphates etc..These Among, with regard to obtaining with for the adhesion of light guide base plate and the viewpoint of the excellent light diffusion part of hardness, being preferably single (2- (methyl) Acryloyl-oxyethyl) phosphate or double (2- (methyl) acryloyl-oxyethyl) phosphates.Phosphoric acid used in the present invention Ester can be used alone a kind of or be applied in combination two or more.

As the commercially available product of phosphate, for example, it can enumerate the trade name of the chemical limited company's manufacture of common prosperity society：Lai Te Ester (Light Ester) P-1M, P-2M, the trade name of NIPPON PHARMACEUTICAL CO., LTD's manufacture：Ka Yama (KAYAMER) PM- 2nd, PM-21 etc..

When the gross mass of composition is set into 100 mass %, the phosphoric acid in the light guide plate composition of present embodiment The content of ester is preferably the mass % of 0.07 mass %~5, the mass % of more preferably 0.2 mass %~2.

＜ surfactants ＞

By the light guide plate in present embodiment with adding surfactant, controllable light guide plate composition in composition Surface tension or light guide base plate wetability.As surfactant, it is not particularly limited, preferably silicon systems surfactant And fluorine system surfactant.

When the gross mass of composition is set into 100 mass %, the surface in the light guide plate composition of present embodiment The content of activating agent is preferably the mass % of 0.01 mass %~2, the mass % of more preferably 0.05 mass %~1.

＜ water ＞

By the light guide plate in present embodiment with water is added in composition, the preservation that there is light guide plate composition is stable Property improve situation.

When the gross mass of composition is set into 100 mass %, water in the light guide plate composition of present embodiment Content is preferably below 0.5 mass %, the mass % of more preferably 0.01 mass %~0.4.

Furthermore, the usual surface area of inorganic particulate is big, and surface is hydrophily, therefore there is the tendency of easy adsorption moisture.Separately On the one hand, organic filler surface area compared with inorganic particulate is small, and surface is hydrophobicity, therefore can suppress water adsorption.Therefore, it is Amount of moisture in strict control light guide plate composition, light diffusion particle (A) is preferably organic filler.

＜ adhesives ＞

By the light guide plate in present embodiment with adhesive is added in composition, light guide base plate and light diffusion part can be improved Adhesion.As adhesive, it is not particularly limited, International Publication No. 2005/071014 or Japanese Patent Laid-Open can be used Adhesive described in 2013-93205 publications.

2. light guide plate

The light guide plate of present embodiment：It is with the composition person of being made using the light guide plate.Specifically, by institute State the coating of light guide plate composition or be printed in surface roughness Ra ＜ 1nm light guide base plate and make light diffusion part.

Fig. 1 is the profile for representing to possess the permeation type visual display unit of the light guide plate of one embodiment of the present invention. Permeation type visual display unit 100 shown in Fig. 1 is mainly made up of planar light source device 20 and infiltration type image displaying part 30. Planar light source device 20 is the edge lighting-type planar light source device for possessing light guide plate 1 and light source 3, and the light guide plate 1 possesses guide-lighting base Plate 11 and light diffusion part 12, the light source 3 located at the side of light guide plate 1 and supply light to light guide plate 1.In addition, light spreads in Fig. 1 Portion 12 is multiple examples of dot shaped.

Light guide base plate 11 be in approximately parallelepiped body shape, with exit facet S1, the exit facet S2 of exit facet S1 opposite side, with Four end face S3 that exit facet S1 and exit facet S2 intersects₁~S3₄.In present embodiment, four end face S3₁~S3₄With exit facet S1 and exit facet S2 are substantially orthogonal.

Light guide plate 1 has multiple smooth diffusion parts 12 located at exit facet S2 sides.Multiple smooth diffusion parts 12 are going out as shown in Figure 2 Penetrate the configuration that is separated from each other on the S2 of face.Plan when Fig. 2 is the light guide base plate from exit facet S2 sides.In Fig. 2, for the ease of saying It is bright, light source 3 is also shown together.In Fig. 2, light diffusion part 12 is separated from each other configuration.The number and configuration pattern of light diffusion part 12 Be by make the light of uniform planar efficiently from exit facet S1 or optionally from exit facet S2 outgoing in the way of be adjusted.

Light source 3 is configured at a pair of end face S3 toward each other as shown in Figures 1 and 2₁、S3₂Side.As shown in Fig. 2 edge Both sides among the exit facet S2 for for example constituting rectangle of light guide base plate 11 four sides toward each other are arranged with multiple point source of lights.

In the composition, the light exported from light source 3 is from end face S3₁、S3₂It is incident to light guide base plate 11.It is incident to light guide base plate 11 light produces diffusing reflection in light diffusion part 12, can adjust the shape of light diffusion part 12, so that the light of uniform planar is efficient Ground is from exit facet S1 or exit facet S2 outgoing.For example, in the case of figure 1, transmission is supplied to from the light of exit facet S1 outgoing Type image displaying part 30.

Hereinafter, it is described in detail to constituting the component of light guide plate, the manufacture method of light guide plate.

2.1. light guide base plate

Light guide plate 1 possesses light guide base plate 11.If the light extraction efficiency from exit facet S1 and exit facet S2 is considered, as long as leading The surface roughness Ra of photopolymer substrate 11 is that Ra ＜ 1nm are just abundant, preferably Ra ＜ 0.5nm.If in addition, considering aftermentioned smooth diffusion part With the adhesion of light guide base plate etc., then preferably Ra ＞ 0.1nm, more preferably Ra ＞ 0.2nm.

Scattering is produced in the end face of light guide base plate in order to suppress the light from light source, as long as the table of the end face of light guide base plate 11 Surface roughness Ra be less than 2 μm, then can by can practical level light from light source incidence to the inside of light guide base plate 11.

Furthermore, " surface roughness Ra " of the light guide base plate 11 of so-called the present application refers to according to Japanese Industrial Standards Obtained by (Japanese Industrial Standards, JIS) B0601-2001 measure " arithmetic mean roughness ".

Typically, in edge lighting-type surface illuminating device, if producing light from light source, heat is produced, is accompanied by this, it is guide-lighting The temperature of substrate also rises.When using resin plate as light guide base plate, the thermal coefficient of expansion of resin plate is high, therefore light guide base plate The change in size because of caused by heat it is bigger than the change in size of liquid crystal panel.But, because the frame of liquid crystal display device is narrow Change, and be difficult to the change in size in the frame portion correction light guide base plate of liquid crystal display device.Therefore, the material of light guide base plate 11 The resin plate that can also be used the change in size because of caused by heat small, but preferably glass substrate.When light guide base plate 11 is glass base During plate, the maximum transmission under optical path length 100nm, the wave-length coverage 350nm~750nm of glass substrate be preferably 50% with On.

The thermal coefficient of expansion of glass substrate is preferably 120 × 10^-7/ DEG C below.If thermal coefficient of expansion exceedes the scope, The difference of display panel and light guide base plate change in size because of caused by heat easily becomes big.In addition, the strain point of glass substrate is preferred For more than 550 DEG C.If strain point is easily reduced less than the scope, the heat resistance of glass substrate, if for example at high temperature, The surface of glass substrate forms reflectance coating or diffusion barrier etc., then glass substrate easily produces thermal deformation.Herein, so-called " strain point " It can be determined based on JISR3103.

2.1.1. glass is constituted

As constitute glass substrate glass composition, be preferably containing 40 mass %~70 mass % SiO₂, 2 mass % ~25 mass % Al₂O₃, the mass % of 0 mass %~20 B₂O₃, the mass % of 0 mass %~25 R₂(R is the one of Li, Na, K to O Kind or it is two or more), the mass % of the mass % of the mass % of 0 mass %~10 MgO, 0 mass %~15 CaO, 0 mass %~10 The mass % of SrO, 0 mass %~15 the mass % of BaO, 0 mass %~10 the mass % of ZnO, 0 mass %~10 ZrO₂。

SiO₂It is the composition of the network former as glass, and is thermal coefficient of expansion is reduced and is made because of caused by heat The composition of change in size reduction.And be the composition for improving acid resistance, strain point.If SiO₂Containing quantitative change it is many, then high temperature glue Property uprise, meltbility reduction, and shaping when easily separate out christobalite devitrification thing.On the other hand, if SiO₂Content tail off, then There is thermal coefficient of expansion to uprise, change in size becomes big tendency because of caused by heat.And acid resistance, strain point are easily reduced.

Al₂O₃It is thermal coefficient of expansion is reduced and is made the composition of the change in size reduction because of caused by heat.And be improved The effect that the devitrification thing of christobalite is separated out when strain point, suppression shaping.If Al₂O₃It is many containing quantitative change, then liquidus temperature rises, difficult To be configured to glass substrate.On the other hand, if Al₂O₃Content tail off, then there is thermal coefficient of expansion and uprise, because of caused by heat Change in size becomes big tendency.And strain point is easily reduced.

B₂O₃It is to be played a role as flux, high temperature viscometrics is reduced, so as to improve the composition of meltbility.And be to make heat The coefficient of expansion reduces and makes the composition of the change in size reduction because of caused by heat.If B₂O₃Content be the scope, then can suppress The change in size because of caused by heat, and meltbility can be improved, and improve processability.

R₂O is high temperature viscometrics is reduced and is improved the composition of meltbility.If R₂O content is the scope, then can make strain Point is improved, and improves the maximum transmission near wavelength 550nm.

MgO is to reduce strain point and high temperature viscometrics reduction is improved the composition of meltbility.If MgO content For the scope, then it can suppress to separate out devitrification thing during shaping.

CaO is to reduce strain point and high temperature viscometrics reduction is improved the composition of meltbility.If CaO content For the scope, then it can suppress to separate out devitrification thing during shaping.

SrO is to improve chemical-resistant, the composition of devitrification resistance.If SrO content is the scope, thermal expansion can be made Coefficient is reduced, and suppresses the change in size because of caused by heat.

BaO is to improve chemical-resistant, the composition of devitrification resistance in the same manner as SrO.If BaO content is the scope, Can then thermal coefficient of expansion be reduced, suppress the change in size because of caused by heat.

ZnO is to improve the composition of meltbility.If ZnO content is the scope, devitrification resistance can be improved.

ZrO₂It is the composition for improving strain point.If ZrO₂Content be the scope, then can suppress shaping when separate out devitrification Thing.

Furthermore, Fe₂O₃、Cr₂O₃、V₂O₅、NiO、MnO₂、Nd₂O₃、CeO₂、Er₂O₃Content Deng transition metal oxide is preferred For below 0.1 mass %.If the content of transition metal oxide is excessive, there is a situation where the reduction of light extraction efficiency.

In addition to the composition, also into other compositions.For example, in order that liquidus temperature reduce, can be by Y₂O₃、 La₂O₃、Nb₂O₅、P₂O₅Many 3 mass % are respectively directed into, as fining agent, can import and be calculated as at most 2 mass %'s with total amount As₂O₃、Sb₂O₃、SnO₂、SO₃, F, Cl etc..

2.1.2. the manufacture method of glass substrate

Glass substrate can using overflow downdraw, slot draw method, float glass process, rolling process (roll out method), draw again Method etc. and make.Furthermore, in float glass process, the temperature difference at the table back side of glass tape is easily produced during shaping, constitutes poor, if but to shaping When temperature strictly controlled, then can reduce its temperature difference, constitute it is poor.It is difficult to produce glass in overflow downdraw, during shaping The temperature difference at the table back side of band, composition are poor, and are not ground and are easily shaped into the good glass substrate of surface quality.

Furthermore, glass substrate is applied to the glass substrate used in display panel, can also have light guide base plate simultaneously Function.Simplified in this way, can constitute the component of display device.

2.2. light diffusion part

The light guide plate 1 of present embodiment possesses the light diffusion part 12 containing light diffusion particle (A).Light diffusion particle (A) Number average particle size Dn (nm) is preferably in 200 ＜ Dn/Ra ＜ relative to the surface roughness Ra (nm) of light guide base plate 11 5000 relation, more preferably 300 ＜ Dn/Ra ＜ 4000.If the value for thinking Dn/Ra is the scope, guide-lighting base can be suppressed The interface of plate 11 and light diffusion part 12 is mixed into space, can improve light extraction efficiency and realize the face of homogeneous and light.

In the Fig. 2 being illustrated before, light diffusion part 12 is multiple examples of dot shaped of circular, is separated from each other and matches somebody with somebody Put, but can consider to adjust shape etc. from the light extraction efficiency needed for exit facet S1 and exit facet S2 in good time.Shown in Fig. 2 The shape of light diffusion part 12 is for convenience of description, it is contemplated that come from the light extraction efficiency needed for exit facet S1 and exit facet S2 It is adjusted.

Light diffusion part 12 is to be made using the light guide plate of composition.As in the formation light diffusion part of light guide base plate 11 12 method, can using silk screen print method, flexographic printing process, from light guide plate described in nozzle spray with spraying process of composition etc. come Make.For example, using International Publication No. 2005/071014, Japanese Patent Laid-Open 2013-93205 publications, Japan Patent Described method makes light diffusion part in JP 2012-178345 publications etc..

It is used as such a light guide plate composition, preferably thermmohardening type or photo-hardening type light guide plate composition.In order to have Effect ground suppresses the deformation of the light guide base material because of caused by heat treatment, is more preferably made using photo-hardening type light guide plate with composition Make light diffusion part.It is preferably to contain in photo-hardening type light guide plate composition to form the light guide plate of light diffusion part 12 with composition There is the radioactive ray constrictive type light guide plate composition of optical polymerism composition and Photoepolymerizationinitiater initiater.

Relative to the area 100% of light guide base plate 11, the area of light diffusion part 12 is preferably more than 5% and less than 95%. Preferably with the remote light source, the area of plane shared by light diffusion part 12 in the applicator surface of light guide base plate 11 is led with described The spreading area of the ratio of the spreading area of tabula rasa composition or the light guide plate composition and the light guide base plate 11 The surface covered ratio of applicator surface area is uprised.Thus, the brightness of light guide plate can be made generally uniform.

2.3. light source

Light source 3 is configured at end face S3 as shown in Figures 1 and 2₁Or S3₂Side.Light source 3 can be cold-cathode fluorescence lamp (Cold Cathode Fluorescent Lamps, CCFL) etc. linear light source, but preferably light emitting diode (Light Emitting Diode, LED) etc. point source of light.In this case, being preferably for example to be constituted going out for rectangle along light guide base plate 11 as shown in Figure 2 The mode that the both sides among face S2 four sides toward each other are arranged with multiple point source of lights is penetrated, light diffusion part 12 and light source 3 are added To combine.

In the composition, the light exported from light source 3 is from end face S3₁Or end face S3₂It is incident to light guide base plate 11.It is incident to and leads The light of photopolymer substrate 11 produces diffusing reflection or diffusion in light diffusion part 12, thus from exit facet S1 or exit facet S2 outgoing.From going out The light for penetrating face S1 or exit facet S2 outgoing is supplied to infiltration type image displaying part 30 etc..In order that the light of uniform planar is efficient Ground can adjust the number and configuration pattern of light diffusion part 12 in good time from exit face.

2.4. infiltration type image displaying part

As shown in figure 1, infiltration type image displaying part 30 is configured in opposite directions in the exit facet S1 sides of light guide plate 1 and light guide plate 1, from The bright infiltration type image displaying part 30 of illumination that exit facet S1 is projected.Infiltration type image displaying part 30, which for example can be used, has liquid crystal list Liquid crystal display part of member etc..

3. embodiment

The present invention is specifically described below based on embodiment, but the present invention is not limited to these embodiments. Then it is quality criteria as long as no special instructions on " part " and " % " in embodiment, comparative example.

3.1. the making of light diffusion particle (A)

3.1.1. the making of hollow-particle 1

Into the reaction vessel of 2 liters of capacity, 194 parts of water of input, 9 parts of methyl methacrylate, 1 part of methacrylic acid, make For 0.92 part of the thioglycolic acid monooctyl ester of molecular weight regulator, 0.04 part of the neopelex as emulsifying agent.It is another Aspect, by 71 parts of methyl methacrylate, 19 parts of methacrylic acid, 0.5 part of thioglycolic acid monooctyl ester, neopelex 0.5 part and 45 parts of water mix to prepare the water-borne dispersions of monomer mixture.

While being stirred to the reaction vessel, while temperature is heated to be into 85 DEG C, input is used as polymerization initiator 5% 6 parts of sodium persulfate aqueous solution.Thereafter at once while be stirred to the reaction vessel, while temperature is remained 90 DEG C, The continuous water-borne dispersions for spending 4 hours to put into the monomer mixture.And then cure within 2 hours, it is 0.200 μm to obtain particle diameter Seed particles A water-borne dispersions (solid constituent is 29.3%).

Into the reaction vessel of 2 liters of capacity 143 parts of water of input, be calculated as 10 parts with solid constituent and (be calculated as with water-borne dispersions 34 parts) the seed particles A water-borne dispersions, 1.2 parts of 80% acrylic acid aqueous solution.On the other hand, by styrene 77.2 Part, 0.8 part of divinylbenzene (m, p- mixture, purity 81%), 1.3 parts of 80% acrylic acid aqueous solution, DBSA 46.7 parts of 0.5 part of sodium and water mix to prepare the water-borne dispersions of monomer mixture.

While being stirred to the reaction vessel, while temperature is heated to be into 80 DEG C, input is used as polymerization initiator 5% 8 parts of sodium persulfate aqueous solution.While being stirred to the reaction vessel, while temperature is remained into 80 DEG C, 2 are continuously spent The water-borne dispersions of the hour input monomer mixture.And then all put into the water-borne dispersions of the monomer to reaction It is disposable at once to put into 19.6 parts of styrene, 0.4 part of divinylbenzene (m, p- mixture, purity 81%), 6% hydrogen after container 20 parts of amine-oxides.Thereafter temperature is risen to 85 DEG C, and then carries out stirring curing in 2 hours, it is 0.487 μm, internal diameter to obtain particle diameter For 0.312 μm, the spherical hollow seed particles B with single emptying aperture of volume void content 26% water-borne dispersions (solid into It is divided into 30.9%).

Into the reaction vessel of 2 liters of capacity 569 parts of water of input, be calculated as 100 parts with solid constituent and (be calculated as with water-borne dispersions 324 parts) 20 parts of water-borne dispersions, the styrene of the hollow seed particles B, divinylbenzene (m, p- mixture, purity 81%) 80 parts, 4 parts of neopelex.While being stirred to the reaction vessel, while holding 3 is small at 40 DEG C When, untill being then heated to 65 DEG C, put into 6 parts of 5% aqueous solution of the sodium peroxydisulfate as polymerization initiator.And then hold reaction Device is heated, and is remained 80 DEG C and is continued stirring, is reaching 2 parts of 5% aqueous solution of input sodium peroxydisulfate after 1 hour after 80 DEG C, And then persistently stir 1 hour.Thereafter, temperature is risen to 85 DEG C, 2 parts of 5% aqueous solution of sodium peroxydisulfate is put into after 1h, And then carry out stirring curing in 1 hour.Thereafter, untill reaction vessel being cooled into 40 DEG C, 50 μm of nylon net pair of mesh is used Content is filtered, and then carries out pressure filtration using the polypropylene cartridge filter of 10 μm of filtering accuracy, is obtained hollow The water-borne dispersions of particle 1 (solid constituent is 20.5%).The small spraying manufactured using outstanding (Buchi) company of Japan's step is dried Device (Mini Spray Dryer) B-290 types and using spray drying process (110 DEG C~220 DEG C of temperature) to obtained aqueous point Granular media is dried, obtain particle diameter be 0.609 μm, internal diameter be 0.381 μm, volume void content be 24% there is single emptying aperture Spherical hollow-particle 1.

In addition, using transmission electron microscope, (Hitachi's new and high technology (Hitachi High-technologies) share has Limit company manufactures, model " H-7650 ") surveyed come major diameter (Rmax) and minor axis (Rmin) to arbitrary 20 hollow-particles 1 It is fixed, its average value is calculated, as a result major diameter is 0.615 μm, minor axis is 0.604 μm, the ratio (Rmax/Rmin) of major diameter and minor axis is 1.02。

In addition, using the water-borne dispersions of the hollow-particle 1 of the acquisition as sample, using using dynamic light scattering method as survey Determine the particle size distribution device (great Mound electronics limited company manufactures, model " Ai Lesi (ELSZ) -1000ZS ") of principle, The number average particle size (Dn) of hollow-particle 1 and the standard deviation (σ) of particle diameter distribution are obtained, fruiting quantities average grain diameter (Dn) is 0.609 μm, standard deviation (σ) is 0.034 μm.According to these values, particle coefficient of alteration (CV values) is calculated using following formula (1), As a result CV values are 0.056.

3.1.2. the making of hollow-particle 2

Into the reaction vessel of 2 liters of capacity 569 parts of water of input, be calculated as 100 parts with solid constituent and (be calculated as with water-borne dispersions 324 parts) 20 parts of water-borne dispersions, the styrene of the hollow seed particles B, divinylbenzene (m, p- mixture, purity 81%) 80 parts, 4 parts of neopelex.While being stirred to the reaction vessel, while holding 3 is small at 40 DEG C When, untill being then heated to 70 DEG C, put into 6 parts of 5% aqueous solution of the sodium peroxydisulfate as polymerization initiator.Temperature is remained 70 DEG C and continue stirring, reach after 70 DEG C 2 parts of 5% aqueous solution that sodium peroxydisulfate is put into after 3 hours, and then carry out 1 hour Stirring curing.Thereafter, untill reaction vessel being cooled into 40 DEG C, content was carried out using 50 μm of nylon net of mesh Filter, and then pressure filtration is carried out using the polypropylene cartridge filter of 10 μm of filtering accuracy, obtain aqueous point of hollow-particle 2 Granular media (solid constituent is 20.5%).The disk-type spray dryer B-290 types and profit manufactured using outstanding (Buchi) company of Japan's step The water-borne dispersions obtained are dried with spray drying process (110 DEG C~220 DEG C of temperature), obtain particle diameter be 0.560 μm, The spherical hollow-particle 2 with single emptying aperture that internal diameter is 0.260 μm, volume void content is 10%.

The major diameter (Rmax) and minor axis (Rmin) of hollow-particle 2 are determined in the same manner as hollow-particle 1, as a result major diameter is 0.587 μm, minor axis be 0.534 μm, the ratio (Rmax/Rmin) of major diameter and minor axis is 1.10.In addition, same with hollow-particle 1 The number average particle size, standard deviation, particle coefficient of alteration of hollow-particle 2 are obtained in ground, and fruiting quantities average grain diameter is 0.560 μ M, standard deviation is 0.099 μm, and particle coefficient of alteration is 0.177.

3.1.3. the making of hollow-particle 3

Into the reaction vessel of 2 liters of capacity 143 parts of water of input, be calculated as 10 parts with solid constituent and (be calculated as with water-borne dispersions 34 parts) the seed particles A water-borne dispersions, 1.2 parts of 80% acrylic acid aqueous solution.On the other hand, by 78 parts of styrene, 46.7 parts of 80% 1.3 parts of acrylic acid aqueous solution, 0.5 part of neopelex and water mix to prepare monomer mixture Water-borne dispersions.

While being stirred to the reaction vessel, while temperature is heated to be into 80 DEG C, input is used as polymerization initiator 5% 8 parts of sodium persulfate aqueous solution.While being stirred to the reaction vessel, while temperature is remained into 80 DEG C, 2 are continuously spent The water-borne dispersions of the hour input monomer mixture.And then all put into the water-borne dispersions of the monomer to reaction It is disposable at once to put into 20 parts of divinylbenzene (m, p- mixture, purity 81%), 20 parts of 6% ammonium hydroxide after container.Thereafter Temperature is risen to 85 DEG C, stirring curing in 2 hours is carried out.Thereafter, untill reaction vessel being cooled into 40 DEG C, 50 μm of mesh is used Nylon net content is filtered, and then using the polypropylene cartridge filter of 10 μm of filtering accuracy pressurizeed Filter, obtains the water-borne dispersions of hollow-particle 3 (solid constituent is 20.5%).Manufactured using outstanding (Buchi) company of Japan's step Disk-type spray dryer B-290 types are simultaneously entered using spray drying process (110 DEG C~220 DEG C of temperature) to the water-borne dispersions obtained Row drying, obtain particle diameter be 0.541 μm, internal diameter be 0.427 μm, volume void content be 49% have single emptying aperture it is spherical in Empty particle 3.

The major diameter (Rmax) and minor axis (Rmin) of hollow-particle 3 are determined in the same manner as hollow-particle 1, as a result major diameter is 0.614 μm, minor axis be 0.469 μm, the ratio (Rmax/Rmin) of major diameter and minor axis is 1.31.In addition, same with hollow-particle 1 The number average particle size, standard deviation, particle coefficient of alteration of hollow-particle 3 are obtained in ground, and fruiting quantities average grain diameter is 0.541 μ M, standard deviation is 0.162 μm, and particle coefficient of alteration is 0.299.

3.1.4. the making of closely knit particle 1

Into the reaction vessel of 2 liters of capacity 947 parts of water of input, be calculated as 1.6 parts with solid constituent and (be calculated as with water-borne dispersions 5.5 parts) the seed particles A 0.5 part of water-borne dispersions, neopelex, while be stirred, while by temperature Degree is heated to be 85 DEG C, puts into 10 parts of 3% persulfate aqueous solution as polymerization initiator.Temperature is remained 85 DEG C, and even It is continuous to spend 3 hour monomers of the input comprising 20 parts of 80 parts of styrene and divinylbenzene (m, p- mixture, purity 81%) to mix Thing.Thereafter, carry out after curing in 2 hours, untill reaction vessel is cooled into 40 DEG C, using the nylon net of 50 μm of mesh to content Thing is filtered, and then carries out pressure filtration using the polypropylene cartridge filter of 10 μm of filtering accuracy, obtains closely knit particle 1 Water-borne dispersions (solid constituent is 10.0%).The disk-type spray dryer B- manufactured using outstanding (Buchi) company of Japan's step Simultaneously the water-borne dispersions obtained are dried using spray drying process (110 DEG C~220 DEG C of temperature) for 290 types, obtain particle diameter For 0.813 μm of closely knit particle 1.

The major diameter (Rmax) and minor axis (Rmin) of closely knit particle 1 are determined in the same manner as hollow-particle 1, as a result major diameter is 0.871 μm, minor axis be 0.755 μm, the ratio (Rmax/Rmin) of major diameter and minor axis is 1.15.In addition, same with hollow-particle 1 The number average particle size, standard deviation, particle coefficient of alteration of closely knit particle 1 are obtained in ground, and fruiting quantities average grain diameter is 0.813 μ M, standard deviation is 0.109 μm, and particle coefficient of alteration is 0.134.

3.1.5. the making of core-shell particles

To double (3,5,5- trimethyl acetyl) peroxide (trade name " her (Peroyl) (registration mark) 355 ", day of Perot Oily (stock) manufacture, water solubility：0.01%) 17.9 parts of 2 parts, 0.1 part of neopelex and water are stirred and emulsified Afterwards, corpusculed is further carried out using ultrasonic homogenizer (SMT (stock) manufactures), and obtains the aqueous dispersion of polymerization initiator Body.Added into the water-borne dispersions of made polymerization initiator and be calculated as 15 parts with solid constituent and (be calculated as with water-borne dispersions 150 parts) the closely knit particle 1 as core particle water-borne dispersions, carry out 16 hours stir.Thereafter, water 680 is added Part, 90 parts of methyl methacrylate, 10 parts of ethylene glycol dimethacrylate, the village minister of BASF (BASF) company manufacture (Joncryl) 50 parts of 10% aqueous solution of (registration mark) 62, and temperature is remained into 40 DEG C and stirring 3 hours, and then by temperature Degree remains 80 DEG C and stirred 3 hours, and the core-shell particles of the surface cement-based powder material cladding of the closely knit particle 1 are synthesized therefrom. Thereafter untill reaction vessel being cooled into 40 DEG C, content is filtered using 50 μm of nylon net of mesh, and then uses The polypropylene cartridge filter of 10 μm of filtering accuracy carries out pressure filtration, obtain core-shell particles water-borne dispersions (solid into It is divided into 12.2%).The disk-type spray dryer B-290 types of outstanding (Buchi) company manufacture are walked using Japan and utilize spray drying The water-borne dispersions obtained are dried method (110 DEG C~220 DEG C of temperature), obtain the core-shell particles that particle diameter is 1.54 μm.

The major diameter (Rmax) and minor axis (Rmin) of core-shell particles are determined in the same manner as hollow-particle 1, its average value is calculated, tied Fruit major diameter is 1.56 μm, minor axis is 1.51 μm, and the ratio (Rmax/Rmin) of major diameter and minor axis is 1.03.In addition, and hollow-particle 1 similarly obtains the number average particle size, standard deviation, particle coefficient of alteration of core-shell particles, and fruiting quantities average grain diameter is 1.540 μm, standard deviation is 0.154 μm, and particle coefficient of alteration is 0.100.

3.1.6. the making of irregular particle

Into the reaction vessel of 2 liters of capacity 947 parts of water of input, be calculated as 1.6 parts with solid constituent and (be calculated as with water-borne dispersions 5.5 parts) the seed particles A 80 parts of water-borne dispersions, styrene, divinylbenzene (m, p- mixture, purity 81%) 15 parts, 5 parts of 2-hydroxyethyl methacrylate, 0.5 part of neopelex, while being stirred, while temperature is added Heat is 85 DEG C, puts into 10 parts of 3% persulfate aqueous solution as polymerization initiator.Temperature is remained 85 DEG C and progress 6 is small When cure, water-borne dispersions of the particle diameter for 0.809 μm of the 1st polymeric particles are obtained therefrom (solid constituent is 10.0%).

To double (3,5,5- trimethyl acetyl) peroxide (trade name " her (Peroyl) (registration mark) 355 ", day of Perot Oily (stock) manufacture, water solubility：0.01%) 17.9 parts of 2 parts, 0.1 part of neopelex and water are stirred and emulsified Afterwards, corpusculed is further carried out using ultrasonic homogenizer (SMT (stock) manufactures), and obtains the aqueous dispersion of polymerization initiator Body.Added into the water-borne dispersions of made polymerization initiator and be calculated as 15 parts with solid constituent and (be calculated as with water-borne dispersions 150 parts) the 1st polymeric particles water-borne dispersions, carry out 16 hours stir.Thereafter, 680 parts of water of addition, methyl-prop 90 parts of e pioic acid methyl ester, 10 parts of ethylene glycol dimethacrylate, village minister (the Joncryl) (note of BASF (BASF) company manufacture Volume trade mark) 62 50 parts of 10% aqueous solution, and temperature is remained into 40 DEG C and stirring 3 hours, and then temperature is remained 80 DEG C And stir 3 hours, irregular particle is synthesized therefrom.Thereafter untill reaction vessel being cooled into 40 DEG C, 50 μm of Buddhist nun of mesh is used Dragon net processed is filtered to content, and then carries out pressure filtration using the polypropylene cartridge filter of 10 μm of filtering accuracy, Obtain the water-borne dispersions of irregular particle (solid constituent is 12.2%).Use the small-sized of outstanding (Buchi) company manufacture of Japan's step Spray dryer B-290 types are simultaneously done using spray drying process (110 DEG C~220 DEG C of temperature) to the water-borne dispersions obtained It is dry, obtain the irregular particle that particle diameter is 1.67 μm.

The major diameter (Rmax) and minor axis (Rmin) of irregular particle are determined in the same manner as hollow-particle 1, its average value is calculated, tied Fruit major diameter is 1.81 μm, minor axis is 1.53 μm, and the ratio (Rmax/Rmin) of major diameter and minor axis is 1.18.In addition, and hollow-particle 1 similarly obtains the number average particle size, standard deviation, particle coefficient of alteration of irregular particle, and fruiting quantities average grain diameter is 1.670 μm, standard deviation is 0.147 μm, and particle coefficient of alteration is 0.088.

3.1.7. calcium carbonate particle A making

The calcium carbonate for being bought oneself and Wako Pure Chemical Industries limited company using agate mortar is crushed, and then is utilized After the classification of water sieve, the disk-type spray dryer B-290 types that are manufactured using outstanding (Buchi) company of step of Japan and using being spray-dried Method (110 DEG C~220 DEG C of temperature) is dried, therefrom make with table 1 record length of particle/minor axis than light spread grain Son.The water-borne dispersions that obtained calcium carbonate particle A is dispersed in water will be made to be set to examination using ultrasonic dispersing machine Sample, obtains calcium carbonate particle A number average particle size, standard deviation, particle coefficient of alteration, as a result in the same manner as hollow-particle 1 Number average particle size is 2.23 μm, and standard deviation is 0.443 μm, and particle coefficient of alteration is 0.199.In addition, same with hollow-particle 1 Determine calcium carbonate particle A major diameter (Rmax) and minor axis (Rmin) sample, calculate its average value, as a result major diameter be 2.32 μm, it is short Footpath is 2.13 μm, and the ratio (Rmax/Rmin) of major diameter and minor axis is 1.09.

3.1.8. barium sulfate particles A making

The barium sulfate for being bought oneself and Wako Pure Chemical Industries limited company using agate mortar is crushed, and then is utilized After the classification of water sieve, the disk-type spray dryer B-290 types that are manufactured using outstanding (Buchi) company of step of Japan and using being spray-dried Method (110 DEG C~220 DEG C of temperature) is dried, therefrom make with table 1 record length of particle/minor axis than light spread grain Son.The water-borne dispersions that obtained barium sulfate particles A is dispersed in water will be made to be set to examination using ultrasonic dispersing machine Sample, obtains barium sulfate particles A number average particle size, standard deviation, particle coefficient of alteration, as a result in the same manner as hollow-particle 1 Number average particle size is 1.970 μm, and standard deviation is 0.355 μm, and particle coefficient of alteration is 0.180.In addition, with hollow-particle 1 Similarly determine barium sulfate particles A major diameter (Rmax) and minor axis (Rmin), calculate its average value, as a result major diameter be 2.14 μm, Minor axis is 1.80 μm, and the ratio (Rmax/Rmin) of major diameter and minor axis is 1.19.

3.1.9. barium sulfate particles B making

The barium sulfate for being bought oneself and Wako Pure Chemical Industries limited company using porcelain mortar is crushed, and then is utilized After the classification of water sieve, the disk-type spray dryer B-290 types that are manufactured using outstanding (Buchi) company of step of Japan and using being spray-dried Method (110 DEG C~220 DEG C of temperature) is dried, therefrom make with table 1 record length of particle/minor axis than light spread grain Son.The water-borne dispersions that obtained barium sulfate particles B is dispersed in water will be made to be set to examination using ultrasonic dispersing machine Sample, obtains barium sulfate particles B number average particle size, standard deviation, particle coefficient of alteration, as a result in the same manner as hollow-particle 1 Number average particle size is 3.97 μm, and standard deviation is 0.881 μm, and particle coefficient of alteration is 0.222.In addition, same with hollow-particle 1 Determine barium sulfate particles B major diameter (Rmax) and minor axis (Rmin) sample, calculate its average value, as a result major diameter be 4.99 μm, it is short Footpath is 2.95 μm, and the ratio (Rmax/Rmin) of major diameter and minor axis is 1.69.

3.1.10. TiO 2 particles A making

The titanium dioxide for being bought oneself and Wako Pure Chemical Industries limited company using agate mortar is crushed, and then carries out profit After the classification of water sieve, walk the disk-type spray dryer B-290 types of outstanding (Buchi) company manufacture using Japan and done using spraying Dry method (110 DEG C~220 DEG C of temperature) is dried, therefrom make with table 1 record length of particle/minor axis than light diffusion Particle.The water-borne dispersions for being dispersed in water obtained TiO 2 particles A using ultrasonic dispersing machine are set For sample, the number average particle size, standard deviation, particle that TiO 2 particles A is obtained in the same manner as hollow-particle 1 change system Number, fruiting quantities average grain diameter is 2.67 μm, and standard deviation is 0.400 μm, and particle coefficient of alteration is 0.150.In addition, with it is hollow Particle 1 similarly determines TiO 2 particles A major diameter (Rmax) and minor axis (Rmin), calculates its average value, as a result major diameter is 2.73 μm, minor axis be 2.60 μm, the ratio (Rmax/Rmin) of major diameter and minor axis is 1.05.

3.2. embodiment 1

By the mass parts of hollow-particle 1 20 of the making, bisphenol-A epoxy base diacrylate (A Kema (Arkema) (stock) manufacture, trade name " CN104 ") 33.1 mass parts, 2- hydroxyl -3- phenoxypropylacrylates (trade name " Niu Fulangte Your (New Frontier) PGA ", the first industrial pharmaceutical (stock) manufacture) 40.1 mass parts, double (2- (methyl) acryloxy second Base) phosphate (trade name " Ka Yama (KAYAMER) PM-2 ", the manufacture of Japanese chemical drug (stock)) 0.4 mass parts, 1- hydroxy-cyclohexyls Phenyl ketone (trade name " gorgeous good solid (Irgacure) 184 ", Japanese BASF (BASF JAPAN) (stock) manufacture) 6.3 mass parts, Hydroquinone monomethyl ether (and the manufacture of Wako Pure Chemical Industries limited company) 0.08 mass parts, MIT (and the manufacture of Wako Pure Chemical Industries limited company) 0.04 mass parts mixing, and then 0.4 matter is turned into the moisture in constituent It is prepared by the mode of amount part.And then use planetary agitating device (Cangfu weaving limited company manufactures, model " KK-50S ") Kneaded, prepare the light guide plate composition as light diffusion particle (A) containing hollow-particle 1.

Then, by the light guide base plate of glass system (NEG limited company manufactures, product name " OA-10G ", Surface roughness Ra=the 0.5nm manufactured using press over system glass substrate) it is placed on operation post, obtained from top by described Light guide plate with composition silk-screen printing be round point shape, harden it using ultraviolet irradiation thereafter, make be formed with therefrom The light guide plate of light diffusion part.

Furthermore, the application conditions of light guide plate composition, ultraviolet irradiation condition and evaluation method are as follows.

＜ application conditions ＞

According to following condition, silk-screen printing is carried out with round dot.Round dot diameter is set to 300 μm, and round dot thickness is set to 15 μm, Round dot pattern is set to the spacing gradual design of 500 μm~2000 μm of spacing.

The size of light guide base plate：Length (length of light conducting direction) is that 718mm, width are that 413mm, thickness are 2mm

Applicator surface：Exit facet (surface of light guide base plate)

Coating method：Silk-screen printing

Mesh：420 mesh/inch

Squeegee angle：50°

Wiping speed：65mm/s

Squeegee pressure：0.198kgf/cm²

Interval：1.1mm

＜ ultraviolets irradiation condition ＞

Lamp：Extra-high-pressure mercury vapour lamp (illumination wavelength is more than 280nm and below 500nm)

Exposure：550mJ/cm²(365nm)

＜ evaluation methods ＞

(1) it is indurative to evaluate

Make after light guide plate hardens with composition, to connect the light diffusion part formed using ultraviolet irradiation as described above Palpation breaks, and recognizable sticky situation is judged as into hardening is bad and is expressed as "×" in table, the feelings of identification viscosity are will be unable to Condition is judged as that hardening is good and "○" is expressed as in table.

(2) brightness disproportionation of light guide plate and the uneven evaluation of colourity

The light source that White LED is configured with wire is set at the both ends of made light guide plate, in the back of the body of the light guide plate The white scattered reflection film of surface side lamination, the lamination optical diffusion film in the applicator surface as face side makes side-light type back side light source. From position of the front away from side-light type back side light source 2m by visual observation come from carrying out, by entire surface be uniform luminance and not Recognize brightness disproportionation, so as to be judged as that very good situation is expressed as " ◎ " in table, will confirm that a little brightness not But can determine whether to be expressed as "○" in table to can be used in the situation for the purposes for not being strict with homogeneous brightness, will substantially confirm It is judged as bad to brightness disproportionation and unworkable situation and is expressed as in table "×".

And then, from front away from side-light type back side light source 2m position by visual observation come from carrying out, will be unable to know Other colourity is uneven, to light be white, can determine whether to be expressed as " ◎ " in table for very good situation, will somewhat recognize colourity It is uneven but can determine whether to be expressed as "○" in table to can be used in the situation of the strict white luminous purposes of failed call, by face The uneven big and unworkable situation of colourity be judged as bad and "×" be expressed as in table.

(3) storage stability

At room temperature, the light guide plate of the preparation is preserved with composition under shading environment, every month is described in Method makes light guide plate, carries out the brightness disproportionation evaluation and colourity inequality is evaluated, thus evaluate the guarantor of light guide plate composition Deposit stability.The brightness disproportionation of light guide plate and colourity is uneven compared with using the situation of light guide plate composition immediately after preparation " ◎ " is expressed as in table for equal situation, change will be somewhat observed but not influence to judge whether as light guide plate to make The situation of degree is expressed as "○" in table, will judge that different situations were expressed as in table to that whether can use “×”。

The measuring reflectance ＞ of ＜ cured films

By the light guide base plate of glass system, (NEG limited company manufactures, trade name " OA-10G ", using overflowing Surface roughness Ra=0.5nm of stream method manufacture glass substrate) it is placed on operation post, from top under the application conditions Light guide plate composition is coated with, thereafter, it is hardened using ultraviolet irradiation under the conditions of ultraviolet irradiation, makes thickness The cured film of 10 μm of light guide plate composition.On the cured film made in this way, according to use spectrophotometer (day This light splitting limited company manufactures, model " V-670 ") determine obtained by reflectance spectrum obtain under wavelength 300nm~380nm Maximum reflectivity (%Rmax) and minimum reflectance (%Rmin) and wavelength 400nm~800nm under maximum reflectivity (%Rmax) and minimum reflectance (%Rmin).Its result is shown in Table 1 in the lump.

3.3. 2~embodiment of embodiment 3

The species of light diffusion particle (A) is set to the particle described in table 1, and changes the usage amount of each composition, except this with Outside, light guide plate composition is made similarly to Example 1, and is evaluated.

3.4. embodiment 4

By the mass parts of core-shell particles 10 of the making, bisphenol-A epoxy base diacrylate (A Kema (Arkema) (stock) Manufacture, trade name " CN104 ") 36.6 mass parts, 2- hydroxyl -3- phenoxypropylacrylates (the first industrial pharmaceutical (stock) make Make, trade name " Niu Fulangteer (New Frontier) PGA ") 44.4 mass parts, double (2- (methyl) acryloyl-oxyethyls) Phosphate (manufacture of Japanese chemical drug (stock), trade name " Ka Yama (KAYAMER) PM-2 ") 0.44 mass parts, 1- hydroxy-cyclohexyl benzene It is base ketone (manufacture of Japanese BASF (BASF JAPAN) (stock), trade name " gorgeous good solid (Irgacure) 184 ") 7.0 mass parts, right Benzenediol monomethyl ether (and the manufacture of Wako Pure Chemical Industries limited company) 0.05 mass parts, MIT (and the manufacture of Wako Pure Chemical Industries limited company) 0.1 mass parts mixing, and then 1.5 mass are turned into the moisture in constituent It is prepared by the mode of part.And then entered using planetary agitating device (Cangfu weaving limited company manufactures, model " KK-50S ") Row mixing, makes contain core-shell particles as the light guide plate composition of light diffusion particle (A) therefrom, similarly to Example 1 Evaluated on ground.

3.5. embodiment 5

By the mass parts of irregular particle 30 of the making, bisphenol-A epoxy base diacrylate (A Kema (Arkema) (stock) Manufacture, trade name " CN104 ") 28.8 mass parts, 2- hydroxyl -3- phenoxypropylacrylates (the first industrial pharmaceutical (stock) make Make, trade name " Niu Fulangteer (New Frontier) PGA ") 34.8 mass parts, double (2- (methyl) acryloyl-oxyethyls) Phosphate (manufacture of Japanese chemical drug (stock), trade name " Ka Yama (KAYAMER) PM-2 ") 0.35 mass parts, 1- hydroxy-cyclohexyl benzene It is base ketone (manufacture of Japanese BASF (BASF JAPAN) (stock), trade name " gorgeous good solid (Irgacure) 184 ") 5.45 mass parts, right Benzenediol monomethyl ether (and Wako Pure Chemical Industries limited company manufacture) 0.1 mass parts, MIT (and Wako Pure Chemical Industries limited company manufactures) mixing of 0.1 mass parts, and then 0.4 mass parts are turned into the moisture in constituent Mode prepare.And then carried out using planetary agitating device (Cangfu weaving limited company manufactures, model " KK-50S ") Mixing, makes contain irregular particle as the light guide plate composition of light diffusion particle (A) therefrom, similarly to Example 1 Evaluated.

3.6. embodiment 6

By the mass parts of calcium carbonate particle A 9 of the making, bisphenol-A epoxy base diacrylate (A Kema (Arkema) (stock) manufacture, trade name " CN104 ") 37.6 mass parts, 2- hydroxyl -3- phenoxypropylacrylate (the first industrial pharmaceuticals (stock) manufacture, trade name " Niu Fulangteer (New Frontier) PGA ") 45.6 mass parts, double (2- (methyl) acryloxies Ethyl) phosphate (manufacture of Japanese chemical drug (stock), trade name " Ka Yama (KAYAMER) PM-2 ") 0.45 mass parts, 1- hydroxyl rings Hexyl phenyl ketone (Japanese BASF (BASF JAPAN) (stock) manufacture, and trade name " gorgeous good solid (Irgacure) 184 ") 7.17 matter Measure part, hydroquinone monomethyl ether (and the manufacture of Wako Pure Chemical Industries limited company) 0.06 mass parts, 2- methyl -4- isothiazole The mixing of quinoline -3- ketone (and Wako Pure Chemical Industries limited company manufacture) 0.02 mass parts, so with the moisture in constituent into It is prepared by the mode for 0.02 mass parts.And then (Cangfu weaving limited company manufactures, model using planetary agitating device " KK-50S ") kneaded, make contain calcium carbonate particle A as the light guide plate composition of light diffusion particle (A) therefrom, Evaluated similarly to Example 1.

3.7. embodiment 7

By the mass parts of barium sulfate particles A 9 of the making, bisphenol-A epoxy base diacrylate (A Kema (Arkema) (stock) manufacture, trade name " CN104 ") 37.6 mass parts, 2- hydroxyl -3- phenoxypropylacrylate (the first industrial pharmaceuticals (stock) manufacture, trade name " Niu Fulangteer (New Frontier) PGA ") 45.6 mass parts, double (2- (methyl) acryloxies Ethyl) phosphate (manufacture of Japanese chemical drug (stock), trade name " Ka Yama (KAYAMER) PM-2 ") 0.45 mass parts, 1- hydroxyl rings Hexyl phenyl ketone (Japanese BASF (BASF JAPAN) (stock) manufacture, and trade name " gorgeous good solid (Irgacure) 184 ") 7.17 matter Measure part, hydroquinone monomethyl ether (and the manufacture of Wako Pure Chemical Industries limited company) 0.05 mass parts, 2- methyl -4- isothiazole The mixing of quinoline -3- ketone (and Wako Pure Chemical Industries limited company manufacture) 0.03 mass parts, so with the moisture in constituent into It is prepared by the mode for 0.03 mass parts.And then (Cangfu weaving limited company manufactures, model using planetary agitating device " KK-50S ") kneaded, make contain barium sulfate particles A as the light guide plate composition of light diffusion particle (A) therefrom, Evaluated similarly to Example 1.

3.8. embodiment 8

By the mass parts of TiO 2 particles A 9 of the making, bisphenol-A epoxy base diacrylate (A Kema (Arkema) (stock) manufacture, trade name " CN104 ") 37.6 mass parts, 2- hydroxyl -3- phenoxypropylacrylate (the first works Industry pharmacy (stock) manufacture, trade name " Niu Fulangteer (New Frontier) PGA ") 45.6 mass parts, double (2- (methyl) propylene Trimethylammonium) phosphate (manufacture of Japanese chemical drug (stock), trade name " Ka Yama (KAYAMER) PM-2 ") 0.45 mass parts, 1- Hydroxycyclohexylphenylketone (Japanese BASF (BASF JAPAN) (stock) manufacture, trade name " gorgeous good solid (Irgacure) 184 ") 7.17 mass parts, hydroquinone monomethyl ether (and the manufacture of Wako Pure Chemical Industries limited company) 0.3 mass parts, 2- methyl -4- are different Thiazoline -3- ketone (and the manufacture of Wako Pure Chemical Industries limited company) 0.03 mass parts mixing, and then with the water in constituent It is prepared by the mode for being divided into 0.04 mass parts.And then (Cangfu weaving limited company manufactures, type using planetary agitating device Number " KK-50S ") kneaded, make contain TiO 2 particles A as the light guide plate group of light diffusion particle (A) therefrom Compound, is evaluated similarly to Example 1.

3.9. 1~comparative example of comparative example 2

Light diffusion particle (A) is changed to the particle and content described in table 1, and changes the usage amount of each composition, except this In addition, light guide plate composition is made similarly to Example 1, and is evaluated.

3.10. evaluation result

Shown in table 1 below the composition of light guide plate composition used in each embodiment and comparative example, physical property with And evaluation result.

[table 1]

Furthermore, the commodity or compound recorded below each materials'use described in table 1.

Decentralized medium (B)：

·B1：Bisphenol-A epoxy base diacrylate, A Kema (Arkema) (stock) manufactures, trade name " CN104 "

·B2：2- hydroxyl -3- phenoxypropylacrylates, the first industrial pharmaceutical (stock) manufacture, trade name " Niu Fulangte You are (New Frontier) PGA "

Free radical scavenger (C)：Hydroquinone monomethyl ether and Wako Pure Chemical Industries (stock) manufacture

Photoepolymerizationinitiater initiater：1- hydroxycyclohexylphenylketones, Japanese BASF (BASF JAPAN) (stock) manufacture, trade name " gorgeous good solid (Irgacure) 184 "

Phosphate：Double (2- (methyl) acryloyl-oxyethyl) phosphates, Japanese chemical drug (stock) manufacture, trade name " are blocked refined Horse (KAYAMER) PM-2 "

Isothiazoline based compound：MIT and Wako Pure Chemical Industries (stock) manufacture

Water：Ion exchange water

Understand the light guide plate composition of 1~embodiment of embodiment 8 hardening is good and excellent storage stability.Separately Outside, it is known that the light guide plate being made using the light guide plate of 1~embodiment of embodiment 8 with composition can effectively suppress brightness not Or colourity is uneven, thus light guide plate face it is luminous homogenieity it is excellent, show the good characteristics of luminescence.

The present invention is not limited to the embodiment, can carry out various modifications.The present invention is included and institute in embodiment Explanation substantially the same composition of composition (for example, function, method and result identical are constituted, or purpose and effect it is identical Composition).In addition, the present invention include by composition and nonessential aliquot replacement illustrated in the embodiment into other The composition constituted.And then, the present invention is also imitated comprising performance with composition identical effect illustrated in the embodiment The composition of fruit or the composition that may achieve identical purpose.And then, the present invention also includes structure illustrated in said embodiment The composition of additional known technology in.

Claims

1. a kind of light guide plate composition, it contains light diffusion particle (A) and decentralized medium (B), the light guide plate composition It is characterised by：

It is anti-under wavelength 300nm~380nm of the cured film for 10 μm of thickness being made using the light guide plate with composition Rate is penetrated for 0%~50%, the reflectivity under wavelength 400nm~800nm is 30%~99%.

2. light guide plate composition according to claim 1, it is characterised in that：The particle diameter of the smooth diffusion particle (A) point Value obtained by the standard deviation divided by number average particle size of cloth is 0.01~0.2, and wherein described value is particle coefficient of alteration.

3. light guide plate composition according to claim 1 or 2, it is characterised in that：The major diameter of the smooth diffusion particle (A) Rmax and minor axis Rmin ratio R max/Rmin is 1.01~1.2 scope.

4. light guide plate composition according to claim 1 or 2, it is characterised in that：Institute is used as comprising optical polymerism composition State decentralized medium (B).

5. light guide plate composition according to claim 1 or 2, it is characterised in that：Also contain free radical scavenger (C).

6. light guide plate composition according to claim 1 or 2, it is characterised in that：Also contain isothiazoline based compound.

7. a kind of light guide plate, it is characterised in that：It is using light guide plate group according to any one of claim 1 to 6 Compound is made.