JP4932017B2 - Lighting member using light diffusing member - Google Patents
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- JP4932017B2 JP4932017B2 JP2010133041A JP2010133041A JP4932017B2 JP 4932017 B2 JP4932017 B2 JP 4932017B2 JP 2010133041 A JP2010133041 A JP 2010133041A JP 2010133041 A JP2010133041 A JP 2010133041A JP 4932017 B2 JP4932017 B2 JP 4932017B2
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- 229920003002 synthetic resin Polymers 0.000 claims abstract description 69
- 239000000057 synthetic resin Substances 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 57
- 238000009792 diffusion process Methods 0.000 claims abstract description 24
- 239000010419 fine particle Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 145
- 239000000377 silicon dioxide Substances 0.000 claims description 70
- 239000002245 particle Substances 0.000 claims description 38
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 21
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 239000010703 silicon Substances 0.000 claims description 21
- 235000012239 silicon dioxide Nutrition 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- 238000005286 illumination Methods 0.000 claims description 14
- 239000011367 bulky particle Substances 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 46
- 239000004973 liquid crystal related substance Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 8
- 238000000465 moulding Methods 0.000 description 7
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 5
- 239000011324 bead Substances 0.000 description 5
- 238000009841 combustion method Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 229910021485 fumed silica Inorganic materials 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 238000010030 laminating Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000005049 silicon tetrachloride Substances 0.000 description 5
- 239000012798 spherical particle Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- Optical Elements Other Than Lenses (AREA)
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- Planar Illumination Modules (AREA)
Abstract
Description
本発明は、光拡散部材と該光拡散部材を用いた照明部材に関するものであり、特に、液晶表示素子として発光ダイオードを用いた液晶ディスプレイ用のバックライトや照明器具に用いられる光拡散部材および該光拡散部材を用いた照明部材に関するものである。 The present invention relates to a light diffusing member and an illuminating member using the light diffusing member, and in particular, a light diffusing member used in a backlight for a liquid crystal display or a lighting fixture using a light emitting diode as a liquid crystal display element, and the illuminating member. The present invention relates to an illumination member using a light diffusing member.
近年、照明用の光源として、その耐久性、省エネルギー性から、発光ダイオード素子が用いられることが知られている。液晶ディスプレイにおいては、発光素子として発光ダイオード（ＬＥＤ）を配置したバックライトが採用されている。このようなバックライトにおいては、複数の発光素子が並べられ、この発光素子と画像表示素子との間に光拡散性の高い光拡散部材を載置して、発光素子が直接視認されない状態でディスプレイに画像が表示されるようになっている。 In recent years, it is known that a light emitting diode element is used as a light source for illumination because of its durability and energy saving. In a liquid crystal display, a backlight in which a light emitting diode (LED) is disposed as a light emitting element is employed. In such a backlight, a plurality of light emitting elements are arranged, and a light diffusing member having high light diffusibility is placed between the light emitting elements and the image display element so that the light emitting elements are not directly visible. An image is displayed on the screen.
しかしながら、このような直下型バックライトにおいては、光拡散部材の光拡散性を高めて発光素子を直接視認できないようにすると、ディスプレイ画面に表示される画像が暗くなり、反対に、光拡散性を低くした場合には、発光素子が直視されたり、ディスプレイ画面に表示される画像の斜め方向からの視認性が悪くなるという問題があった。このような、問題に鑑みて、特許文献にしめすごとく、種々の工夫がなされている。たとえば、屈折率の異なる２以上のシート体を１００枚以上積層して光拡散部材を形成したり（特許文献１）、ポリマー層と、モノマー吸収層を積層して光拡散部材を形成したり（特許文献２）、または、光拡散部材の光源側の個所と光源と反対に位置する個所とに凹凸形状を設けた光拡散部材を形成したり（特許文献３）していた。しかし、これらの光拡散部材は、いずれも複数のシート体を積層して形成してなるものであり、製造工程が複雑であり、また、ディスプレイ画面に表示される画像の全方向からの視認性が必ずしも良好なものとはいえなかった。 However, in such a direct type backlight, if the light diffusing property of the light diffusing member is increased so that the light emitting element cannot be directly seen, the image displayed on the display screen becomes darker. When it is lowered, there is a problem that the light emitting element is viewed directly or visibility of an image displayed on the display screen from an oblique direction is deteriorated. In view of such problems, various ideas have been made as shown in the patent literature. For example, a light diffusion member is formed by laminating 100 or more sheets of two or more sheets having different refractive indexes (Patent Document 1), or a light diffusion member is formed by laminating a polymer layer and a monomer absorption layer ( Patent Document 2), or a light diffusing member provided with a concavo-convex shape at a position on the light source side of the light diffusing member and a position opposite to the light source has been formed (Patent Document 3). However, each of these light diffusing members is formed by laminating a plurality of sheet bodies, the manufacturing process is complicated, and the visibility of the image displayed on the display screen from all directions However, it was not necessarily good.
また、室内灯、室外灯等の照明器具用の光源として、その耐久性、省エネルギー性から、発光ダイオード素子が用いられることが知られている。しかしながら、発光ダイオードの照射光は、指向性、光拡散性がよいとはいえず広い面積を照らすことができないことから蛍光剤を塗布する、照明器具の形状を改良する等、種々の光拡散手段が設けられてきた。 In addition, it is known that a light-emitting diode element is used as a light source for lighting fixtures such as room lights and outdoor lights because of its durability and energy saving. However, the light emitted from the light-emitting diode is not good in directivity and light diffusibility and cannot illuminate a wide area. Therefore, various light diffusing means such as applying a fluorescent agent and improving the shape of a lighting fixture are available. Has been established.
そこで、本願発明は、光源からの光を拡散させる光拡散部材において、光の指向性、拡散性がよく、輝度むらがなく、また、製造が容易な光拡散部材を提供し、また、液晶ディスプレイ画面を照明するバックライトや、室内灯、屋外灯等の照明器具等の照明部材において、光の指向性、拡散性がよい照明部材を提供することを目的とする。 Accordingly, the present invention provides a light diffusing member that diffuses light from a light source, provides a light diffusing member that has good light directivity and diffusibility, no luminance unevenness, and is easy to manufacture, and a liquid crystal display An object of the present invention is to provide an illuminating member having good light directivity and diffusibility in an illuminating member such as a backlight for illuminating a screen, an illuminating device such as an indoor lamp and an outdoor lamp.
そこで本発明の光拡散部材は、光源に積層され光源からの照射光を拡散させる光拡散部材であって、透光性を有する合成樹脂基材に光源からの照射光をミー散乱させる粒径の光拡散微粒子を混合した合成樹脂材をシート状、板状またはフィルム状に形成したことを基本構成とするものであるが、具体的には、本発明の光拡散部材は、光源に積層され光源からの照射光を拡散させる合成樹脂材を有し、前記合成樹脂材をシート状、板状またはフィルム状に形成した光拡散部材であって、前記合成樹脂材は、透光性を有する合成樹脂基材に、前記光源からの照射光をミー散乱させる粒径の二酸化珪素の光拡散微粒子を凝集・融着した微細凝集体の高分散シリカを混合してなり、前記二酸化珪素の光拡散微粒子は、直径１０〜３０ｎｍの球状体であり、前記高分散シリカの前記微細凝集体は、前記光拡散微粒子が複数凝集した粒径１００〜４００ｎｍの嵩高凝集体であることを特徴とする。 Therefore, the light diffusing member of the present invention is a light diffusing member that is laminated on the light source and diffuses the light emitted from the light source, and has a particle size that causes the light emitted from the light source to be scattered into a synthetic resin substrate having translucency. The basic structure is that a synthetic resin material mixed with light diffusing fine particles is formed into a sheet shape, a plate shape, or a film shape. Specifically, the light diffusing member of the present invention is laminated on a light source. A light diffusing member having a synthetic resin material for diffusing the irradiation light from the sheet, and forming the synthetic resin material into a sheet shape, a plate shape, or a film shape, wherein the synthetic resin material is a synthetic resin having translucency A base material is mixed with highly dispersed silica in a fine aggregate obtained by agglomerating and fusing light-diffusing fine particles of silicon dioxide having a particle size that scatters the irradiation light from the light source, and the light-diffusing fine particles of silicon dioxide are A spherical body with a diameter of 10 to 30 nm , The fine aggregates of the high dispersed silica is characterized in that the light diffusing fine particles are bulky aggregates of multiple aggregated particle size 100 to 400 nm.
また、本発明の光拡散部材において、前記合成樹脂材は、透光性を有する合成樹脂基材に二酸化珪素の微粒子を混合したことを特徴とする。 In the light diffusing member of the present invention, the synthetic resin material is characterized in that silicon dioxide fine particles are mixed in a synthetic resin base material having translucency.
前記合成樹脂材は、透光性を有する合成樹脂基材に二酸化珪素の微粒子を凝集・融着した微細凝集体の高分散シリカを混合した合成樹脂材であることを特徴とする。 The synthetic resin material is a synthetic resin material in which a high-dispersion silica in a fine aggregate obtained by agglomerating and fusing silicon dioxide fine particles is mixed with a synthetic resin base material having translucency.
前記二酸化珪素の微粒子は直径１０〜３０ｎｍの球状体であり、前記高分散シリカの前記微細凝集体は前記微粒子が複数凝集した粒径１００〜４００ｎｍの嵩高凝集体であることを特徴とする。 The fine particles of silicon dioxide are spherical bodies having a diameter of 10 to 30 nm, and the fine aggregates of the highly dispersed silica are bulky aggregates having a particle diameter of 100 to 400 nm in which a plurality of the fine particles are aggregated.
前記透光性を有する合成樹脂基材は、透光性シリコン樹脂であることを特徴とする。 The synthetic resin base material having translucency is a translucent silicon resin.
前記合成樹脂材は、肉厚部分と肉薄部分が同ピッチで繰り返し形成したことを特徴とする。 The synthetic resin material is characterized in that a thick portion and a thin portion are repeatedly formed at the same pitch.
また、本発明の照明部材は、光源と、前記光源からの照射光を拡散させる合成樹脂材を有してなる光拡散部材とを有する照明部材であって、
前記合成樹脂材は、透光性を有する合成樹脂基材に、前記光源からの照射光をミー散乱させる粒径の二酸化珪素の光拡散微粒子を凝集・融着した微細凝集体の高分散シリカを混合してなり、前記二酸化珪素の光拡散微粒子は、直径１０〜３０ｎｍの球状体であり、前記高分散シリカの前記微細凝集体は、前記光拡散微粒子が複数凝集した粒径１００〜４００ｎｍの嵩高凝集体であり、
前記合成樹脂材を前記光源にモールドして密着積層し前記光源を包囲するシート状、板状またはフィルム状の前記光拡散部材を形成するとともに前記光拡散部材に湾曲状の肉厚部分と肉薄部分を同ピッチで繰り返し形成してなり、前記光拡散部材の前記肉厚部分を前記光源の前方位置に配設し、前記光拡散部材の光源と反対側の面には透明合成樹脂部材を積層したことを特徴とする照明部材。
Moreover, the illumination member of the present invention is an illumination member having a light source and a light diffusing member comprising a synthetic resin material that diffuses irradiation light from the light source,
The synthetic resin material is made of highly dispersed silica of fine aggregate obtained by agglomerating and fusing light diffusing fine particles of silicon dioxide having a particle size that allows Mie scattering of light irradiated from the light source on a synthetic resin base material having translucency. The light diffusion fine particles of silicon dioxide are spherical bodies having a diameter of 10 to 30 nm, and the fine aggregates of the highly dispersed silica are bulky particles having a particle diameter of 100 to 400 nm in which a plurality of the light diffusion fine particles are aggregated. Agglomerates,
The synthetic resin material is molded on the light source and closely laminated to form the sheet-like, plate-like, or film-like light diffusing member surrounding the light source, and the light diffusing member has a curved thick portion and a thin portion. The thick portion of the light diffusing member is disposed at the front position of the light source, and a transparent synthetic resin member is laminated on the surface opposite to the light source of the light diffusing member. illumination member, characterized in that.
前記透光性を有する合成樹脂基材は、透光性シリコン樹脂であることを特徴とする。 The synthetic resin base material having translucency is a translucent silicon resin.
前記光源前方に前記光拡散部材を、間隔をあけて配設したことを特徴とする。 The light diffusing member is disposed in front of the light source at an interval.
前記光源は、発光ダイオードであることを特徴とする。 The light source is a light emitting diode.
本発明の光拡散部材の構成によれば、透光性を有する合成樹脂基材に光源からの照射光をミー散乱させる粒径の光拡散微粒子を混合した合成樹脂材をシート状または板状に形成したことにより、光源からの照射光を均一に拡散し、輝度が高く、光の指向性に優れた拡散部材とすることができる。 According to the configuration of the light diffusing member of the present invention, a synthetic resin material in which a light diffusing fine particle having a particle size that causes Mie scattering of irradiation light from a light source is mixed with a synthetic resin base material having translucency in a sheet shape or a plate shape. By forming, it is possible to obtain a diffusing member that uniformly diffuses the irradiation light from the light source, has high brightness, and excellent light directivity.
また、本発明の照明部材の構成によれば、光源の前方に、透光性を有する合成樹脂基材に光源からの照射光をミー散乱させる粒径の光拡散微粒子を混合した合成樹脂材をシート状または板状に形成した光拡散部材を配設したことにより光源からの照射光を均一に拡散し、輝度の高い拡散部材とすることができ、正面方向からはもちろんのこと斜め方向からの視認性もよい全方位型の照明部材を提供することができる。 Further, according to the configuration of the illumination member of the present invention, the synthetic resin material in which the light diffusing fine particles having a particle size that causes the Mie scattering of the irradiation light from the light source is mixed with the translucent synthetic resin base material in front of the light source. By arranging the light diffusing member formed in the form of a sheet or plate, the light emitted from the light source can be uniformly diffused to obtain a diffusing member with high brightness, not only from the front direction but also from the oblique direction. An omnidirectional illumination member with high visibility can be provided.
（第１の実施形態）
本願発明の第１の実施の形態の光拡散部材２を図１および図２に示す。第１の実施の形態の光拡散部材２は、発光ダイオード等の光源からの照射光を拡散させる目的に用いられるもので、発光ダイオード等の光源の前方または、光源を包囲するように配置して用いられ、後述するように、この光拡散部材２は、バックライトや照明器具に用いることができる。
(First embodiment)
A light diffusing member 2 according to a first embodiment of the present invention is shown in FIGS. The light diffusing member 2 of the first embodiment is used for the purpose of diffusing irradiated light from a light source such as a light emitting diode, and is disposed in front of the light source such as a light emitting diode or so as to surround the light source. As will be described later, the light diffusing member 2 can be used for a backlight or a lighting fixture.
光拡散部材２は、合成樹脂材９を肉薄、長尺なシート状に形成したものである。この光拡散部材２を形成する合成樹脂材９は、図２の模式図に示すように、ある程度の弾性を有するシリコン樹脂を基材として基質部９１が形成され、この基質部９１に高分散シリカの粉粒体９２が混合された形態の透光性をもつ合成樹脂材であり光源と基板が発する熱に耐えうる合成樹脂材である。模式図に示すごとく、基質物となるシリコン樹脂の内部に、断面位置に関係なく、ほぼ均一に高分散シリカの粒状凝集体が分散されている。前記高分散シリカは、一般には乾式シリカ、フュームドシリカと称されるものであり、四塩化珪素の燃焼加水分解により製造される。より具体的には、燃焼法によって得られた二酸化珪素は空気中で真球状の粒子状態（直径１０〜３０ｎｍ）となるが、この二酸化珪素の粒子が複数個、数珠状に凝集・融着し、嵩高の凝集体（粒径１００〜４００ｎｍ）を形成して高分散シリカとなる。 The light diffusing member 2 is obtained by forming the synthetic resin material 9 into a thin and long sheet shape. As shown in the schematic diagram of FIG. 2, the synthetic resin material 9 forming the light diffusing member 2 has a substrate portion 91 formed of a silicon resin having a certain degree of elasticity as a base material. This is a synthetic resin material having translucency in a form in which powder particles 92 are mixed, and can withstand the heat generated by the light source and the substrate. As shown in the schematic diagram, granular aggregates of highly dispersed silica are dispersed almost uniformly inside the silicon resin as the substrate regardless of the cross-sectional position. The highly dispersed silica is generally called dry silica or fumed silica, and is produced by combustion hydrolysis of silicon tetrachloride. More specifically, silicon dioxide obtained by the combustion method is in the form of spherical particles (diameter: 10 to 30 nm) in the air, and a plurality of the silicon dioxide particles are aggregated and fused in a bead shape. , A bulky aggregate (particle size 100 to 400 nm) is formed to become highly dispersed silica.
尚、混合される粒子は、上述の高分散シリカに限られず粒子の大きさと照射光の波長とが同程度か同程度以上の照射光をミー散乱させる粒子であればよい。尚、ミー散乱は粒子の大きさと複素屈折率に依存し、以下の２式で表される（ｘはサイズパラメータ、ａｎおよびｂｎはミー級数、λは光の波長である。）。
このような高分散シリカをシリコンなどの基質物に加えることにより、種々の効果がもたらされる。照射光の側面からいえば、高分散シリカを混合添加したシリコン基質の合成樹脂材９は、高分散シリカに照射光が反射し、乳白色を呈しながら光拡散部材の全面が照光する光の指向性、散乱性が向上し、輝度むらのない光拡散部材を生成することができる。また、高分散シリカの粒度を調整することにより、例えば粒子径を大とすることで、基板の前方への光の指向性が増し、使用目的や使用箇所に応じて適切な指向性、散乱性を確保できる。また光拡散部材の厚みにより高分散シリカの混合量を変えてもよい。一般に、光拡散部材の厚みが厚い場合には、高分散シリカの混合量を少なく、反対に拡散部材の厚みが薄い場合には、高分散シリカの混合量を多く混合し確実なミー散乱をさせるようにすることが望ましい。 By adding such highly dispersed silica to a substrate such as silicon, various effects are brought about. Speaking from the side of the irradiation light, the synthetic resin material 9 of the silicon substrate to which high dispersion silica is mixed and added reflects the irradiation light to the high dispersion silica, and directs the light that the entire surface of the light diffusing member is illuminated while exhibiting milky white color. In addition, the light diffusing member having improved scattering properties and no luminance unevenness can be generated. In addition, by adjusting the particle size of the highly dispersed silica, for example, by increasing the particle size, the directivity of light toward the front of the substrate increases. Can be secured. Further, the mixing amount of the highly dispersed silica may be changed depending on the thickness of the light diffusing member. In general, when the thickness of the light diffusing member is thick, the amount of high-dispersion silica mixed is small. On the other hand, when the thickness of the diffusing member is thin, the amount of high-dispersion silica mixed is mixed to ensure reliable Mie scattering. It is desirable to do so.
また、物性面からいえば、高分散シリカを加えたシリコン樹脂からなる光拡散部材２は、適正な弾性が付与され耐衝撃性が向上される。さらに、シリコンに高分散シリカを加えたことで表面のべとつき防止など表面性状の改善の効果が発揮され、また射出成形や押出成形などのモールド成形における形状保持性が確保される。 In terms of physical properties, the light diffusing member 2 made of silicon resin to which highly dispersed silica is added has appropriate elasticity and improved impact resistance. Furthermore, by adding highly dispersed silica to silicon, the effect of improving surface properties such as prevention of surface stickiness is exhibited, and shape retention in molding such as injection molding and extrusion molding is ensured.
尚、また、図１１（ａ）に示す光拡散部材２の片面に、図１１（ｂ）に示すようにＰＥＴ樹脂等の透明合成樹脂部材１６を積層した光拡散部材１１としてもよいし、図１１（ｃ）に示すように光拡散部材２の両面に透明合成樹脂部材１６を積層した光拡散部材１１２としてもよい。このように透明合成樹脂部材１６を積層することで、表面の汚れを防ぐことができ、また、汚れが付着した場合には、この透明合成樹脂部材１６を交換することができる。さらには、透明合成樹脂部材１６を積層することにより光源との距離を調節して照光具合を調節したり、透明合成樹脂部材に顔料を添加して色彩を調節することができる。 In addition, it is good also as the light-diffusion member 11 which laminated | stacked transparent synthetic resin members 16, such as PET resin, as shown in FIG.11 (b) on the single side | surface of the light-diffusion member 2 shown to Fig.11 (a), 11 (c), a light diffusing member 112 in which a transparent synthetic resin member 16 is laminated on both surfaces of the light diffusing member 2 may be used. By laminating the transparent synthetic resin member 16 in this way, it is possible to prevent surface contamination, and when the contamination adheres, the transparent synthetic resin member 16 can be replaced. Further, by laminating the transparent synthetic resin member 16, the distance from the light source can be adjusted to adjust the lighting condition, or the pigment can be added to the transparent synthetic resin member to adjust the color.
また、第１の実施の形態においては合成樹脂基材にシリコン樹脂を用いているが、他の透光性合成樹脂材、例えばポリエステル樹脂、ポリウレタン樹脂、エポキシ樹脂など透光性をもつ熱硬化性樹脂、場合によっては基板などで発生する温度より融点の高い透光性の熱可塑性樹脂とすることも可能である。 In the first embodiment, a silicone resin is used for the synthetic resin base material, but other light-transmitting synthetic resin materials such as a polyester resin, a polyurethane resin, and an epoxy resin have a light-transmitting thermosetting property. It is also possible to use a light-transmitting thermoplastic resin having a melting point higher than the temperature generated in the resin, in some cases, the substrate.
また、第１の実施の形態の光拡散部材２のバリエーションの光拡散部材としては、図６に示すバックライト７に用いる光拡散部材４のように、肉厚部分と肉薄部分が同ピッチ繰り返し形成されるシート状にしてもよい。また、光拡散部材２は、薄く長尺のシート状に形成したが、シートよりも厚みを有する板状に形成してもよいし、シートよりも薄いフィルム状に形成してもよい。 Further, as a light diffusing member as a variation of the light diffusing member 2 of the first embodiment, a thick portion and a thin portion are repeatedly formed at the same pitch as in the light diffusing member 4 used in the backlight 7 shown in FIG. It may be in the form of a sheet. Moreover, although the light diffusing member 2 is formed in a thin and long sheet shape, it may be formed in a plate shape having a thickness larger than that of the sheet, or may be formed in a film shape thinner than the sheet.
（第２の実施の形態）
本願発明の第２の実施の形態は、光拡散部材３を用いたバックライト１を図３〜図５に示す。このバックライト１は、光拡散部材を用いた照明部材の例の一つである。バックライト１は、不図示の液晶ディスプレイを背面から照明するために用いられ、液晶画像装置の一部を構成するものである。
(Second Embodiment)
2nd Embodiment of this invention shows the backlight 1 using the light-diffusion member 3 in FIGS. The backlight 1 is one example of an illumination member using a light diffusing member. The backlight 1 is used to illuminate a liquid crystal display (not shown) from the back, and constitutes a part of the liquid crystal image device.
第２の実施の形態のバックライト１は、発光ダイオード６を光源として用い、光源としての発光ダイオード６と発光ダイオード６からの照射光をディスプレイに導くシート状の光拡散部材３から形成される。 The backlight 1 of the second embodiment is formed by using a light emitting diode 6 as a light source, a light emitting diode 6 as a light source, and a sheet-like light diffusing member 3 that guides irradiation light from the light emitting diode 6 to a display.
図３、図４に示すように、基板５上には、複数の発光ダイドード６ａ、６ｂ、６ｃ（〜６ｘ）が実装されており、基板５は、ＡＣアダプター、低電流制御装置等不図示の制御装置を介し、電源コード１８を通じて電源へと接続される。 As shown in FIGS. 3 and 4, a plurality of light emitting diodes 6 a, 6 b, 6 c (˜6x) are mounted on the substrate 5, and the substrate 5 is not shown such as an AC adapter, a low current control device, and the like. It is connected to the power source through the power cord 18 through the control device.
そして、発光ダイオード６を実装した状態の基板５には、合成樹脂材９からなる光拡散部材３がモールドによりぴったりと密着して積層されている。このようにモールドすることにより、基板５と光拡散部材３を接着剤等で接着することなく、発光ダイオード６を光拡散層３がぴったりと包囲した状態のバックライト１を提供することができる。 The light diffusing member 3 made of the synthetic resin material 9 is closely adhered to the substrate 5 on which the light emitting diodes 6 are mounted by a mold. By molding in this way, it is possible to provide the backlight 1 in a state where the light diffusion layer 3 exactly surrounds the light emitting diode 6 without bonding the substrate 5 and the light diffusion member 3 with an adhesive or the like.
この光拡散部材３を形成する合成樹脂材９は、第１の実施の形態に示したものと同様であり、ある程度の弾性を有するシリコン樹脂を基材として基質部９１が形成され、この基質部９１に高分散シリカの粉粒体９２が混合された形態の透光性をもつ合成樹脂材であり光源と基板が発する熱に耐えうる合成樹脂材である。模式図に示すごとく、基質物となるシリコン樹脂の内部に、断面位置に関係なく、ほぼ均一に高分散シリカの粒状凝集体が分散されている。前記高分散シリカは、一般には乾式シリカ、フュームドシリカと称されるものであり、四塩化珪素の燃焼加水分解により製造される。より具体的には、燃焼法によって得られた二酸化珪素は空気中で真球状の粒子状態（直径１０〜３０ｎｍ）となるが、この二酸化珪素の粒子が複数個、数珠状に凝集・融着し、嵩高の凝集体（粒径１００〜４００ｎｍ）を形成して高分散シリカとなる。尚、混合される粒子は、上述の高分散シリカに限られず粒子の大きさと照射光の波長とが同程度か同程度以上の照射光をミー散乱させる粒子であればよく、ミー散乱を表す一般式は上述した通りである。 The synthetic resin material 9 forming the light diffusing member 3 is the same as that shown in the first embodiment, and a substrate portion 91 is formed using a silicon resin having a certain degree of elasticity as a base material. 91 is a synthetic resin material having translucency in a form in which powder particles 92 of highly dispersed silica are mixed with 91, and is a synthetic resin material that can withstand the heat generated by the light source and the substrate. As shown in the schematic diagram, granular aggregates of highly dispersed silica are dispersed almost uniformly inside the silicon resin as the substrate regardless of the cross-sectional position. The highly dispersed silica is generally called dry silica or fumed silica, and is produced by combustion hydrolysis of silicon tetrachloride. More specifically, silicon dioxide obtained by the combustion method is in the form of spherical particles (diameter: 10 to 30 nm) in the air, and a plurality of the silicon dioxide particles are aggregated and fused in a bead shape. , A bulky aggregate (particle size 100 to 400 nm) is formed to become highly dispersed silica. The particles to be mixed are not limited to the above-described highly dispersed silica, but may be any particles that can scatter the irradiation light having the same size or the same wavelength or larger than the wavelength of the irradiation light. The formula is as described above.
このような高分散シリカをシリコンなどの基質物に加えることにより、種々の効果がもたらされる。照射光の側面からいえば、高分散シリカを混合添加したシリコン基質の合成樹脂材９は、高分散シリカに照射光が反射し、乳白色を呈しながら照光し、光の指向性、散乱性が向上し、柔らかい照明が生成されて、輝度むらがなく、また輝度の高いバックライトを提供することができる。また、高分散シリカの粒度を調整することにより、例えば粒子径を大とすることで、基板の前方への光の指向性が増し、使用目的や使用箇所に応じて適切な指向性、散乱性を確保できる。 By adding such highly dispersed silica to a substrate such as silicon, various effects are brought about. Speaking from the side of the irradiation light, the synthetic resin material 9 of the silicon substrate to which high-dispersion silica is mixed and added reflects the irradiation light to the high-dispersion silica and illuminates while exhibiting milky white, improving the light directivity and scattering property. In addition, soft illumination is generated, and a backlight with high luminance and no luminance unevenness can be provided. In addition, by adjusting the particle size of the highly dispersed silica, for example, by increasing the particle size, the directivity of light toward the front of the substrate increases. Can be secured.
また、物性面からいえば、高分散シリカを加えたシリコン樹脂からなる照光部は、適正な弾性が付与され耐衝撃性が向上される。さらに、シリコンに高分散シリカを加えたことで表面のべとつき防止など表面性状の改善の効果が発揮され、また射出成形や押出成形などのモールド成形における形状保持性が確保される。 In terms of physical properties, the illuminated portion made of silicon resin to which highly dispersed silica is added has appropriate elasticity and improved impact resistance. Furthermore, by adding highly dispersed silica to silicon, the effect of improving surface properties such as prevention of surface stickiness is exhibited, and shape retention in molding such as injection molding and extrusion molding is ensured.
このような光拡散性、指向性に優れたバックライト１により照明される液晶画面に形成される画像は、正面方向からはもちろんのこと、斜め方向からも充分に視認することができる。 Such an image formed on the liquid crystal screen illuminated by the backlight 1 having excellent light diffusibility and directivity can be sufficiently visually recognized not only from the front direction but also from an oblique direction.
尚、このようなバックライト１の製造は、基板５に発光ダイオード６を実装してなる基板を型内に配置し、ここに合成樹脂材９を薄くモールドすることにより形成することができる。 Such a backlight 1 can be manufactured by placing a substrate in which a light emitting diode 6 is mounted on a substrate 5 in a mold and molding a synthetic resin material 9 thinly.
（第３の実施の形態）
本願発明の第３の実施の形態のバックライト７を図６に示す。バックライト７も、不図示の液晶ディスプレイを背面から照明するために用いられ、液晶画像装置の一部を構成するものである。
(Third embodiment)
A backlight 7 according to a third embodiment of the present invention is shown in FIG. The backlight 7 is also used for illuminating a liquid crystal display (not shown) from the back, and constitutes a part of the liquid crystal image device.
第３の実施の形態のバックライト７は、複数の発光ダイオード６を光源として用い、光源としての発光ダイオード６と発光ダイオード６からの照射光をディスプレイに導く湾曲状の肉厚部分４１と肉薄部分４２が同ピッチで交互に形成された光拡散部材４と透明合成樹脂部材８から形成される。 The backlight 7 according to the third embodiment uses a plurality of light emitting diodes 6 as light sources, the light emitting diodes 6 serving as light sources, and a curved thick portion 41 and a thin portion for guiding irradiation light from the light emitting diodes 6 to the display. 42 is formed from the light diffusion member 4 and the transparent synthetic resin member 8 alternately formed at the same pitch.
図６に示すように、基板５上には、複数の発光ダイドード６ａ、６ｂ、６ｃ、６ｄ、６ｅ（〜６ｘ）が実装されており、基板５は、ＡＣアダプター、低電流制御装置等不図示の制御装置を介し、電源コード１８を通じて電源へと接続される。 As shown in FIG. 6, a plurality of light emitting diodes 6a, 6b, 6c, 6d, and 6e (up to 6x) are mounted on the substrate 5. The substrate 5 is not shown in the figure, such as an AC adapter and a low current control device. And connected to the power source through the power cord 18.
そして、発光ダイオード６ａ、６ｂ、６ｃ、６ｄ、６ｅを実装した基板５の上面において、発光ダイオード６ａ、６ｂ、６ｃ、６ｄ、６ｅ対応する位置に光拡散部材４の湾曲状の肉厚部分４１がそれぞれ配設され、発光ダイオード６が実装されていない部分に肉薄部分４２が配設されるように積層されている。また、光拡散部材４の上面には、光拡散部材４の肉厚部分４１と肉薄部分４２を平して、バックライト７の表面を平らに形成するべくＰＥＴ樹脂等からなる透明合成樹脂部材８が積層されている。 Then, on the upper surface of the substrate 5 on which the light emitting diodes 6a, 6b, 6c, 6d, and 6e are mounted, the curved thick portion 41 of the light diffusing member 4 is located at a position corresponding to the light emitting diodes 6a, 6b, 6c, 6d, and 6e. The thin portions 42 are disposed so as to be disposed in portions where the light emitting diodes 6 are not mounted. A transparent synthetic resin member 8 made of PET resin or the like is formed on the upper surface of the light diffusing member 4 so that the thick portion 41 and the thin portion 42 of the light diffusing member 4 are flattened and the surface of the backlight 7 is formed flat. Are stacked.
本実施の形態において、光拡散部材４は、発光ダイオード６ａ、６ｂ、６ｃ、６ｄが実装された基板５をモールドし、光拡散部材４は、発光ダイオード６ａ、６ｂ、６ｃ、６ｄにぴったりと密着して積層形成され、さらに光拡散部材４の基板５と反対側の面には透明合成樹脂層８がモールドされている。このようにモールドすることにより、基板５と光拡散部材４と透明合成樹脂部材８を接着剤等で接着することなく、発光ダイオード６を光拡散部材４がぴったりと包囲した状態のバックライト７を提供することができる。また光拡散層４の肉厚部分４１において発光ダイオード６からの照射光は確実にミー散乱を起こし拡散されるようになる。 In this embodiment, the light diffusing member 4 molds the substrate 5 on which the light emitting diodes 6a, 6b, 6c, and 6d are mounted, and the light diffusing member 4 closely contacts the light emitting diodes 6a, 6b, 6c, and 6d. A transparent synthetic resin layer 8 is molded on the surface of the light diffusion member 4 opposite to the substrate 5. By molding in this way, the backlight 7 in a state where the light diffusing member 4 exactly surrounds the light emitting diode 6 without bonding the substrate 5, the light diffusing member 4 and the transparent synthetic resin member 8 with an adhesive or the like. Can be provided. Further, in the thick portion 41 of the light diffusion layer 4, the irradiation light from the light emitting diode 6 surely causes Mie scattering and is diffused.
光拡散部材４を形成する合成樹脂材９は、第１の実施の形態に示したものと同様であり、ある程度の弾性を有するシリコン樹脂を基材として基質部９１が形成され、この基質部９１に高分散シリカの粉粒体９２が混合された形態の透光性をもつ合成樹脂材であり光源と基板が発する熱に耐えうる合成樹脂材である。模式図に示すごとく、基質物となるシリコン樹脂の内部に、断面位置に関係なく、ほぼ均一に高分散シリカの粒状凝集体が分散されている。前記高分散シリカは、一般には乾式シリカ、フュームドシリカと称されるものであり、四塩化珪素の燃焼加水分解により製造される。より具体的には、燃焼法によって得られた二酸化珪素は空気中で真球状の粒子状態（直径１０〜３０ｎｍ）となるが、この二酸化珪素の粒子が複数個、数珠状に凝集・融着し、嵩高の凝集体（粒径１００〜４００ｎｍ）を形成して高分散シリカとなる。尚、混合される粒子は、上述の高分散シリカに限られず粒子の大きさと照射光の波長とが同程度か同程度以上の照射光をミー散乱させる粒子であればよく、ミー散乱を表す一般式は上述した通りである。 The synthetic resin material 9 forming the light diffusing member 4 is the same as that shown in the first embodiment, and a substrate portion 91 is formed using a silicon resin having a certain degree of elasticity as a base material. Further, it is a synthetic resin material having translucency in a form in which powder particles 92 of highly dispersed silica are mixed, and is a synthetic resin material that can withstand the heat generated by the light source and the substrate. As shown in the schematic diagram, granular aggregates of highly dispersed silica are dispersed almost uniformly inside the silicon resin as the substrate regardless of the cross-sectional position. The highly dispersed silica is generally called dry silica or fumed silica, and is produced by combustion hydrolysis of silicon tetrachloride. More specifically, silicon dioxide obtained by the combustion method is in the form of spherical particles (diameter: 10 to 30 nm) in the air, and a plurality of the silicon dioxide particles are aggregated and fused in a bead shape. , A bulky aggregate (particle size 100 to 400 nm) is formed to become highly dispersed silica. The particles to be mixed are not limited to the above-described highly dispersed silica, but may be any particles that can scatter the irradiation light having the same size or the same wavelength or larger than the wavelength of the irradiation light. The formula is as described above.
このような光拡散性、指向性に優れたバックライト７により照明される液晶画面に形成される画像は、正面方向からはもちろんのこと、斜め方向からも充分に視認することができる。 Such an image formed on the liquid crystal screen illuminated by the backlight 7 having excellent light diffusibility and directivity can be sufficiently visually recognized not only from the front direction but also from the oblique direction.
尚、このようなバックライト７の製造は、発光ダイオード６を実装してなる基板を型内に配置し、ここに合成樹脂材９を薄くモールドし、さらに透明合成樹脂部材８をモールドすることにより形成することができる。 The backlight 7 is manufactured by placing a substrate on which the light-emitting diode 6 is mounted in a mold, molding a synthetic resin material 9 thinly, and then molding a transparent synthetic resin member 8. Can be formed.
（第４の実施の形態）
本願発明の第４の実施の形態のバックライト７１を図７に示す。バックライト７１も、不図示の液晶ディスプレイを背面から照明するために用いられ、液晶画像装置の一部を構成するものである。
(Fourth embodiment)
A backlight 71 according to a fourth embodiment of the present invention is shown in FIG. The backlight 71 is also used to illuminate a liquid crystal display (not shown) from the back, and constitutes a part of the liquid crystal image device.
第４の実施の形態のバックライト７１は、複数の発光ダイオード６を光源として用い、光源としての発光ダイオード６と発光ダイオード６からの照射光をディスプレイに導く光拡散部材４３から形成される。 The backlight 71 of the fourth embodiment is formed by using a plurality of light emitting diodes 6 as light sources, and a light diffusing member 43 that guides irradiation light from the light emitting diodes 6 and the light emitting diodes 6 to the display.
図７に示すように、基板５上には、複数の発光ダイオード６ａ、６ｂ、６ｃ（〜６ｘ）が実装されており、基板５は、ＡＣアダプター、低電流制御装置等不図示の制御装置を介し、電源コードを通じて電源へと接続される。 As shown in FIG. 7, a plurality of light emitting diodes 6a, 6b, 6c (up to 6x) are mounted on the substrate 5, and the substrate 5 is provided with a control device (not shown) such as an AC adapter and a low current control device. Through the power cord.
そして、発光ダイオード６ａ、６ｂ、６ｃを実装した基板５の上面において、板状に形成された光拡散部材４３は、発光ダイオード６ａ、６ｂ、６ｃとの間に空間部４４を有するように発光ダイオード６ａ、６ｂ、６ｃの前方に配設されている。発光ダイオード６ａ、６ｂ、６ｃから照射される光は空間部４４を進み、光拡散部材４３内でミー散乱され光拡散されるようになっている。 Then, on the upper surface of the substrate 5 on which the light emitting diodes 6a, 6b, and 6c are mounted, the light diffusion member 43 formed in a plate shape has a space 44 between the light emitting diodes 6a, 6b, and 6c. It is arrange | positioned ahead of 6a, 6b, 6c. Light emitted from the light emitting diodes 6 a, 6 b, and 6 c travels through the space 44 and is Mie scattered and diffused in the light diffusion member 43.
光拡散部材４３を形成する合成樹脂材９は、第１の実施の形態に示したものと同様であり、ある程度の弾性を有するシリコン樹脂を基材として基質部９１が形成され、この基質部９１に高分散シリカの粉粒体９２が混合された形態の透光性をもつ合成樹脂材であり光源と基板が発する熱に耐えうる合成樹脂材である。模式図に示すごとく、基質物となるシリコン樹脂の内部に、断面位置に関係なく、ほぼ均一に高分散シリカの粒状凝集体が分散されている。前記高分散シリカは、一般には乾式シリカ、フュームドシリカと称されるものであり、四塩化珪素の燃焼加水分解により製造される。より具体的には、燃焼法によって得られた二酸化珪素は空気中で真球状の粒子状態（直径１０〜３０ｎｍ）となるが、この二酸化珪素の粒子が複数個、数珠状に凝集・融着し、嵩高の凝集体（粒径１００〜４００ｎｍ）を形成して高分散シリカとなる。 The synthetic resin material 9 forming the light diffusing member 43 is the same as that shown in the first embodiment, and the substrate portion 91 is formed using a silicon resin having a certain degree of elasticity as a base material. Further, it is a synthetic resin material having translucency in a form in which powder particles 92 of highly dispersed silica are mixed, and is a synthetic resin material that can withstand the heat generated by the light source and the substrate. As shown in the schematic diagram, granular aggregates of highly dispersed silica are dispersed almost uniformly inside the silicon resin as the substrate regardless of the cross-sectional position. The highly dispersed silica is generally called dry silica or fumed silica, and is produced by combustion hydrolysis of silicon tetrachloride. More specifically, silicon dioxide obtained by the combustion method is in the form of spherical particles (diameter: 10 to 30 nm) in the air, and a plurality of the silicon dioxide particles are aggregated and fused in a bead shape. , A bulky aggregate (particle size 100 to 400 nm) is formed to become highly dispersed silica.
このような光拡散性、指向性に優れたバックライト７１により照明される液晶画面に形成される画像は、正面方向からはもちろんのこと、斜め方向からも充分に視認することができる。特に、発光ダイオード６ａ、６ｂ、６ｃと光拡散部材４３との間に空間部４４をつくることにより、発光ダイオード６ａ、６ｂ、６ｃからの照射光が均一で輝度むらがなく、拡散部材４３全体がより均一に照光するバックライト７１を提供することができる。 Such an image formed on the liquid crystal screen illuminated by the backlight 71 having excellent light diffusibility and directivity can be sufficiently viewed not only from the front direction but also from an oblique direction. In particular, by forming the space 44 between the light-emitting diodes 6a, 6b, 6c and the light diffusing member 43, the light emitted from the light-emitting diodes 6a, 6b, 6c is uniform and has no uneven brightness, and the entire diffusing member 43 The backlight 71 that illuminates more uniformly can be provided.
尚、このようなバックライト７１の製造は、発光ダイオード６を実装してなる基板５に不図示の脚部を介して光拡散部材４３を配設することにより形成される。 Such a backlight 71 is manufactured by disposing a light diffusing member 43 on a substrate 5 on which the light emitting diode 6 is mounted via legs (not shown).
（第５の実施の形態）
本願発明の第５の実施の形態のサークライト型の照明器具１０を、図８〜図１０に示す。照明器具１０は、天井部等に設置された電源ボックスユニット１５に嵌合端子１４を嵌合させて用いる照明器具であり、従来の蛍光灯照明器具に替えて用いることができる照明器具である。
(Fifth embodiment)
A circular light fixture 10 according to a fifth embodiment of the present invention is shown in FIGS. The lighting fixture 10 is a lighting fixture that is used by fitting a fitting terminal 14 to a power supply box unit 15 installed on a ceiling or the like, and can be used instead of a conventional fluorescent lamp lighting fixture.
第５の実施の形態の照明器具１０は、複数の発光ダイオード６を光源として用い、合成樹脂材９からなる光拡散部材１１とこれに積層される透明合成樹脂部材１６からなる照光部を有する。 The luminaire 10 of the fifth embodiment uses a plurality of light emitting diodes 6 as light sources, and has a light diffusing member 11 made of a synthetic resin material 9 and an illumination part made of a transparent synthetic resin member 16 laminated thereon.
この第５の実施形態の照明器具１０は、照明器具１０の天板を兼ねる基板１２には、複数の発光ダイオード６ａ、６ｂ（〜６ｘ）が実装され、光拡散部材１１に透明合成樹脂部材１６を積層した盆状の照光部が、脚部１１ａを介して発光ダイオード６ａ、６ｂを包囲し、透明合成樹脂部材１６が積層されている側の面が、発光ダイオード６ａ、６ｂ側に向くように、発光ダイオード６ａ、６ｂ前方に空間部１３を確保するように発光ダイオード６ａ、６ｂ前方に間隔を確保するように取り付けられている。発光ダイオード６ａ、６ｂから照射される光は空間部１３を進み、光拡散部材１１内でミー散乱され光拡散されるようになっている。 In the lighting fixture 10 of the fifth embodiment, a plurality of light emitting diodes 6 a and 6 b (˜6x) are mounted on a substrate 12 that also serves as a top plate of the lighting fixture 10, and the transparent synthetic resin member 16 is mounted on the light diffusing member 11. Are stacked so that the surface on which the transparent synthetic resin member 16 is laminated faces the light emitting diodes 6a and 6b. The light emitting diodes 6a and 6b are attached so as to secure a space in front of the light emitting diodes 6a and 6b so as to secure the space 13 in front of the light emitting diodes 6a and 6b. The light emitted from the light emitting diodes 6 a and 6 b travels through the space 13 and is Mie scattered and diffused in the light diffusing member 11.
また、発光ダイオード６ａ、６ｂ（〜６ｘ）を実装した基板１２の後方電源ボックスユニット１５側にはＡＣアダプター、定電流エンジン、光センサユニット等の制御ユニット１７が取り付けられていて、電源ボックスユニット１５に嵌合する端子１４が突出しており、この端子１４を建物等の天井部等に配設された電源ボックスユニット１５に嵌合させて使用され、従来の蛍光灯照明器具に替えて用いることができる照明器具である。 Further, a control unit 17 such as an AC adapter, a constant current engine, an optical sensor unit or the like is attached to the rear power supply box unit 15 side of the substrate 12 on which the light emitting diodes 6a and 6b (˜6x) are mounted. A terminal 14 that fits into the projection protrudes and is used by fitting the terminal 14 to a power supply box unit 15 disposed on a ceiling or the like of a building or the like, and can be used in place of a conventional fluorescent lamp luminaire. It is a lighting fixture that can.
また、発光ダイオードを実装してなる基板１２は、放熱性のセラミック素材で形成して、基板からの熱を遠赤外線に代えて放熱させるようにしてもよい。 Further, the substrate 12 on which the light emitting diode is mounted may be formed of a heat-dissipating ceramic material so that heat from the substrate is dissipated instead of far infrared rays.
光拡散部材１１を形成する合成樹脂材９は、第１の実施の形態における同様であり、ある程度の弾性を有するシリコン樹脂を基材として基質部９１が形成され、この基質部９１に高分散シリカの粉粒体９２が混合された形態の透光性をもつ合成樹脂材であり光源と基板が発する熱に耐えうる合成樹脂材である。模式図に示すごとく、基礎質物となるシリコン樹脂の内部に、断面位置に関係なく、ほぼ均一に高分散シリカの粒状凝集体が分散されている。前記高分散シリカは、一般には乾式シリカ、フュームドシリカと称されるものであり、四塩化珪素の燃焼加水分解により製造される。より具体的には、燃焼法によって得られた二酸化珪素は空気中で真球状の粒子状態（直径１０〜３０ｎｍ）となるが、この二酸化珪素の粒子が複数個、数珠状に凝集・融着し、嵩高の凝集体（粒径１００〜４００ｎｍ）を形成して高分散シリカとなる。尚、混合される粒子は、上述の高分散シリカに限られず粒子の大きさと照射光の波長とが同程度か同程度以上の照射光をミー散乱させる粒子であればよく、ミー散乱を表す一般式は上述した通りである。 The synthetic resin material 9 forming the light diffusing member 11 is the same as that in the first embodiment, and a substrate portion 91 is formed using a silicon resin having a certain degree of elasticity as a base material. This is a synthetic resin material having translucency in a form in which powder particles 92 are mixed, and can withstand the heat generated by the light source and the substrate. As shown in the schematic drawing, the granular aggregates of highly dispersed silica are dispersed almost uniformly inside the silicon resin as the base material regardless of the position of the cross section. The highly dispersed silica is generally called dry silica or fumed silica, and is produced by combustion hydrolysis of silicon tetrachloride. More specifically, silicon dioxide obtained by the combustion method is in the form of spherical particles (diameter: 10 to 30 nm) in the air, and a plurality of the silicon dioxide particles are aggregated and fused in a bead shape. , A bulky aggregate (particle size 100 to 400 nm) is formed to become highly dispersed silica. The particles to be mixed are not limited to the above-described highly dispersed silica, but may be any particles that can scatter the irradiation light having the same size or the same wavelength or larger than the wavelength of the irradiation light. The formula is as described above.
この照明器具１０は、建物等の天井部等に配設された電源ボックスユニット１５の嵌合部に照明器具１０から突出する端子１４を挿入しながら嵌合させて固定することにより、天井設置型の照明器具として機能し、発光ダイオード６ａ、６ｂからの照射光は、光拡散部材１１全方位に拡散させて乳白色に広範囲を照明する照明器具を提供することができる。 The luminaire 10 is a ceiling-mounted type by being fitted and fixed while inserting a terminal 14 protruding from the luminaire 10 into a fitting portion of a power supply box unit 15 disposed on a ceiling portion of a building or the like. It is possible to provide a lighting fixture that illuminates a wide range of milky white by diffusing light emitted from the light emitting diodes 6a and 6b in all directions of the light diffusing member 11.
尚、本願発明においては、光拡散部材を用いる照明部材の実施例として、バックライトとサークライト形の照明器具を示したが、光拡散部材の用途はこれに限られるものではなく、発光ダイオードを光源としてなる照明部材において幅広く用いることができる。 In the present invention, as an example of a lighting member using a light diffusing member, a backlight and a circular light fixture are shown, but the use of the light diffusing member is not limited to this, and a light emitting diode is used. It can be widely used in an illumination member as a light source.
１ バックライト
２ 光拡散部材
３ 光拡散部材
４ 光拡散部材
４１ 肉厚部分
４２ 肉薄部分
４３ 光拡散部材
４４ 空間部
５ 基板
６ 発光ダイオード
７ バックライト
７１ バックライト
９ 合成樹脂材
９１ 基質部
９２ 高分散シリカの粉粒体
１０ 照明器具
１１ 光拡散部材
１１２ 光拡散部材
１２ 基板
１３ 空間部
１４ 端子
１５ 電源ボックスユニット
１６ 透明合成樹脂部材
１７ 制御ユニット
１８ 電源コード
DESCRIPTION OF SYMBOLS 1 Backlight 2 Light diffusing member 3 Light diffusing member 4 Light diffusing member 41 Thick part 42 Thin part 43 Light diffusing member 44 Space part 5 Substrate 6 Light emitting diode 7 Back light 71 Back light 9 Synthetic resin material 91 Substrate part 92 High dispersion Silica granular material 10 Lighting fixture 11 Light diffusing member 112 Light diffusing member 12 Substrate 13 Space portion 14 Terminal 15 Power supply box unit 16 Transparent synthetic resin member 17 Control unit 18 Power cord
Claims (3)
前記合成樹脂材は、透光性を有する合成樹脂基材に、前記光源からの照射光をミー散乱させる粒径の二酸化珪素の光拡散微粒子を凝集・融着した微細凝集体の高分散シリカを混合してなり、前記二酸化珪素の光拡散微粒子は、直径１０〜３０ｎｍの球状体であり、前記高分散シリカの前記微細凝集体は、前記光拡散微粒子が複数凝集した粒径１００〜４００ｎｍの嵩高凝集体であり、
前記合成樹脂材を前記光源にモールドして密着積層し前記光源を包囲するシート状、板状またはフィルム状の前記光拡散部材を形成するとともに前記光拡散部材に湾曲状の肉厚部分と肉薄部分を同ピッチで繰り返し形成してなり、前記光拡散部材の前記肉厚部分を前記光源の前方位置に配設し、前記光拡散部材の光源と反対側の面には透明合成樹脂部材を積層したことを特徴とする照明部材。 An illumination member having a light source and a light diffusion member having a synthetic resin material that diffuses irradiation light from the light source,
The synthetic resin material is made of highly dispersed silica of fine aggregate obtained by agglomerating and fusing light diffusing fine particles of silicon dioxide having a particle size that allows Mie scattering of light irradiated from the light source on a synthetic resin base material having translucency. The light diffusion fine particles of silicon dioxide are spherical bodies having a diameter of 10 to 30 nm, and the fine aggregates of the highly dispersed silica are bulky particles having a particle diameter of 100 to 400 nm in which a plurality of the light diffusion fine particles are aggregated. Agglomerates,
The synthetic resin material is molded on the light source and closely laminated to form the sheet-like, plate-like, or film-like light diffusing member surrounding the light source, and the light diffusing member has a curved thick portion and a thin portion. The thick portion of the light diffusing member is disposed at the front position of the light source, and a transparent synthetic resin member is laminated on the surface opposite to the light source of the light diffusing member. illumination member, characterized in that.
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|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |