JP6135897B2 - LED lamp - Google Patents
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- JP6135897B2 JP6135897B2 JP2012087108A JP2012087108A JP6135897B2 JP 6135897 B2 JP6135897 B2 JP 6135897B2 JP 2012087108 A JP2012087108 A JP 2012087108A JP 2012087108 A JP2012087108 A JP 2012087108A JP 6135897 B2 JP6135897 B2 JP 6135897B2
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Description
本発明は、広告塔や看板等を投光するＬＥＤ電球に係わり、特に照射ムラを抑える技術に関する。 The present invention relates to an LED light bulb that projects an advertising tower, a signboard, and the like, and particularly relates to a technique for suppressing irradiation unevenness.
近年、環境意識の高まりから、省電力化に優れたＬＥＤ素子を光源に使用した電球形のＬＥＤランプが盛んに用いられるようになってきており、広告塔や看板を照射するセルフバラスト水銀灯を代替するＬＥＤランプも開発されてきている。
このような看板照明等を目的としたＬＥＤランプでは、投光されるスポット光が所望の大きさに制御され、照射ムラのない被照射面が得られることが重要である。
In recent years, due to growing environmental awareness, light bulb-type LED lamps that use LED elements with excellent power savings as light sources have been actively used, replacing self-ballast mercury lamps that illuminate advertising towers and billboards. LED lamps have also been developed.
In such an LED lamp for signboard illumination or the like, it is important that the projected spot light is controlled to a desired size and an irradiated surface without irradiation unevenness is obtained.
特許文献１に記載されているＬＥＤランプでは、ＬＥＤ基板を取り付けたトレー状のベース板の側壁に、ＬＥＤを取り囲むようにベース板の円周に沿って配置され、ＬＥＤから入射する光線成分を透光性カバーに向けて反射する反射面を有した環状の反射体を備えている（第１実施形態の［００２１］）。かかる反射体を備えることで、ＬＥＤランプの水平方向（ＬＥＤ基板の面に平行な方向）への光の拡がりが抑えられ、所望のビーム角を得ることができ、また照射ムラも抑えられている。
また特許文献２に記載されているＬＥＤランプでは、照射開口部に向けて拡開するように内面側に反射面が形成された反射体と、照射開口部を覆うとともに、少なくとも内面側における周縁部がブラスト処理された透光性カバーとを具備することで、所望のビーム角を維持したまま、照射ムラを抑えることができている。
In the LED lamp described in Patent Document 1, it is arranged along the circumference of the base plate so as to surround the LED on the side wall of the tray-like base plate to which the LED substrate is attached, and transmits light components incident from the LED. An annular reflector having a reflecting surface that reflects toward the optical cover is provided ([0021] of the first embodiment). By providing such a reflector, the spread of light in the horizontal direction of the LED lamp (direction parallel to the surface of the LED substrate) can be suppressed, a desired beam angle can be obtained, and irradiation unevenness can also be suppressed. .
Further, in the LED lamp described in Patent Document 2, a reflector having a reflecting surface formed on the inner surface side so as to expand toward the irradiation opening, and the irradiation opening are covered, and at least a peripheral portion on the inner surface side. By providing a translucent cover that has been blasted, irradiation unevenness can be suppressed while maintaining a desired beam angle.
しかしながら、特許文献１では、ＬＥＤの配置と反射体の位置を最適化する必要があり、ＬＥＤの配置が規制され、また部品点数や組み立て工程が増えてしまう。
更に特許文献２では、照射ムラを無くすために、透光性カバーの内側をブラスト処理しているが、そのブラスト処理範囲が記載されていなく、そのブラスト処理領域が狭ければ照射ムラが生じ、広ければ被照射面の照度が不均一になる。
本発明は、以上のような課題を解決するため鋭意検討した結果なされたものであり、反射体を使用せず、透光性カバーのみで、所望のビーム角と、照射ムラ及び色ムラの無い被照射面とを実現するＬＥＤランプを提供することを目的とする。
However, in Patent Document 1, it is necessary to optimize the arrangement of the LEDs and the position of the reflectors, which restricts the arrangement of the LEDs, and increases the number of parts and the assembly process.
Further, in Patent Document 2, in order to eliminate irradiation unevenness, the inner side of the translucent cover is blasted, but the blasting range is not described, and if the blasting region is narrow, irradiation unevenness occurs, If it is wide, the illuminance on the irradiated surface will be non-uniform.
The present invention has been made as a result of intensive studies to solve the above-described problems, and does not use a reflector, and has only a light-transmitting cover, and has no desired beam angle, irradiation unevenness, and color unevenness. It aims at providing the LED lamp which implement | achieves a to-be-irradiated surface.
請求項１に記載の発明にあたっては、ＬＥＤ素子が実装されたＬＥＤ基板と、一端面側に前記ＬＥＤ基板が設置された筐体と、前記ＬＥＤ素子を覆うように前記筐体の一端部に係合されたドーム形状の透光性カバーとからなり、前記透光性カバーの前記筐体との係合部から頂部にかけての一部に光散乱領域を設けたことを特徴とするものである。 According to the first aspect of the present invention, the LED board on which the LED element is mounted, the casing in which the LED board is installed on one end face side, and the one end of the casing so as to cover the LED element. The dome-shaped translucent cover is combined, and a light scattering region is provided in a part from the engaging portion of the translucent cover with the housing to the top.
請求項２に記載の発明にあたっては、前記透光性カバーは、前記筐体との係合部から頂部にかけて曲率が漸減するドーム形状に形成され、前記光散乱領域は、前記筐体との係合部の全周端から頂部に向かって環状帯形状に形成され、前記環状帯形状の帯幅が、ビーム角に合わせて決定されていることを特徴とするものである。
ビーム角は、ＬＥＤ素子の光軸方向の明るさが１／２になる角度である。
In the invention according to claim 2, the translucent cover is formed in a dome shape in which the curvature gradually decreases from the engaging portion to the top portion of the case, and the light scattering region is related to the case. It is formed in an annular band shape from the entire peripheral edge of the joint portion toward the top, and the band width of the annular band shape is determined in accordance with the beam angle.
The beam angle is an angle at which the brightness of the LED element in the optical axis direction is halved.
請求項３に記載の発明にあたっては、前記筐体と、前記ＬＥＤ基板の間に、放熱部材が配置され、前記放熱部材は、一端面が開口した内部が中空な有底筒状体からなり、前記放熱部材の内側の底面に、前記ＬＥＤ基板が載置され、前記放熱部材の開口縁部に、前記透光性カバーが係合されていることを特徴とするものである。 In the invention according to claim 3, a heat radiating member is disposed between the housing and the LED substrate, and the heat radiating member is formed of a bottomed cylindrical body having an open end and a hollow end. The LED board is placed on the bottom surface inside the heat radiating member, and the translucent cover is engaged with the opening edge of the heat radiating member.
請求項１または２の発明によれば、曲率変化と一定の帯幅の光散乱領域を備えた透光性カバーを使用することで、特別な反射体を用いることなく、所望のビーム角で、照射ムラ及び色ムラが生じない被照射面を実現するＬＥＤランプを提供できる。
なお前記帯幅を大きくすることで、ビーム角を広くでき、前記帯幅を小さくすることで、ビーム角を狭くできる。
また透光性カバー全面に光散乱領域を設けると、前記透光性カバーの形状によって、所望のビーム角を得ることができるものの、前記光散乱領域を形成したシボ加工等の模様が被照射面に映りこむようになるので好ましくない。
According to the invention of claim 1 or 2, by using a translucent cover provided with a light scattering region having a curvature change and a constant bandwidth, a desired beam angle can be obtained without using a special reflector. The LED lamp which implement | achieves the to-be-irradiated surface which does not produce an irradiation nonuniformity and color nonuniformity can be provided.
The beam angle can be widened by increasing the band width, and the beam angle can be narrowed by decreasing the band width.
In addition, when a light scattering region is provided on the entire surface of the light-transmitting cover, a desired beam angle can be obtained depending on the shape of the light-transmitting cover, but a pattern such as a textured process in which the light scattering region is formed is irradiated. It is not preferable because it is reflected in the image.
請求項３の発明によれば、有底筒状体の放熱部材を用いることで、ＬＥＤ素子で発生した熱が電源基板に伝導しにくくなるため電子部品の寿命を伸ばすことができ、長寿命であって、所望のビーム角を有し、照射ムラ及び色ムラが生じないＬＥＤランプを提供できる。 According to the invention of claim 3, by using the heat-dissipating member of the bottomed cylindrical body, the heat generated in the LED element is less likely to be conducted to the power supply substrate, so that the life of the electronic component can be extended, and the long life Thus, it is possible to provide an LED lamp having a desired beam angle and free from irradiation unevenness and color unevenness.
以下に本発明の好適な実施の形態について、図面を参照しながら説明する。なお本実施の形態は一例であり、これに限定されるものではない。図１は、本実施形態に係わるＬＥＤランプ１０の外観図である。図２は本実施形態に係わるＬＥＤランプ１０の断面図である。図３は本実施形態に係わる透光性カバーの外観図である。図４は本実施形態に係わる透光性カバーの断面図である。 Preferred embodiments of the present invention will be described below with reference to the drawings. Note that this embodiment is merely an example, and the present invention is not limited to this. FIG. 1 is an external view of an LED lamp 10 according to the present embodiment. FIG. 2 is a cross-sectional view of the LED lamp 10 according to the present embodiment. FIG. 3 is an external view of the translucent cover according to the present embodiment. FIG. 4 is a cross-sectional view of the translucent cover according to this embodiment.
本実施形態に係わるＬＥＤランプ１０は、屋外の看板等を照射するためのもので、複数のＬＥＤ素子１と、ＬＥＤ基板２と、放熱部材３と、筐体４と、電源基板５と、透光性カバー６と、口金７とを具備している。 The LED lamp 10 according to the present embodiment is for illuminating an outdoor signboard or the like, and includes a plurality of LED elements 1, an LED substrate 2, a heat radiating member 3, a housing 4, a power supply substrate 5, a transparent substrate. A light cover 6 and a base 7 are provided.
ＬＥＤ素子１としては公知の種々のＬＥＤを用いることができる。本実施形態では、照明用の白色光を発光する高輝度タイプのＬＥＤ素子を用いている。またチップオンボード型のＬＥＤモジュールを使用してもよい。 As the LED element 1, various known LEDs can be used. In this embodiment, a high-luminance type LED element that emits white light for illumination is used. A chip-on-board type LED module may be used.
ＬＥＤ基板２は、略円形の平板で公知のガラスエポキシ基板、金属基板、セラミックス基板等のプリント基板を用いることができる。本実施形態では、電気絶縁樹脂で被覆された金属基板からなるプリント基板が用いられ、片面にＬＥＤ素子１が実装されている。 The LED substrate 2 may be a generally circular flat plate and may be a known printed circuit board such as a glass epoxy substrate, a metal substrate, or a ceramic substrate. In the present embodiment, a printed circuit board made of a metal substrate coated with an electrically insulating resin is used, and the LED element 1 is mounted on one side.
放熱部材３は、熱伝導率の高い材料（例えば、アルミニウム、銅などの金属材料や酸化金属材料など）で形成されていることが好ましい。本実施形態では、アルミニウムを用いて、円柱形状の有底筒体に形成され、表面がアルマイト処理されたものを使用している。この放熱部材３の内側底面に、ＬＥＤ基板２が接合されている。この放熱部材３の外周面が、ＬＥＤランプ１０の外殻の一部を形成しており外気に露出し、外側底面が筐体４に接合している。
なお、前記内側底面に放熱グリースの塗布あるいは熱伝導性ゴム等を挟み込み、隙間を無くすことが好ましい。これによって、ＬＥＤ素子１で発生した熱が、放熱部材３に伝導しやすくなり効率的に放熱されるようになる。
The heat dissipating member 3 is preferably formed of a material having high thermal conductivity (for example, a metal material such as aluminum or copper or a metal oxide material). In the present embodiment, aluminum is used that is formed into a cylindrical bottomed cylindrical body and whose surface is anodized. The LED substrate 2 is bonded to the inner bottom surface of the heat radiating member 3. The outer peripheral surface of the heat radiating member 3 forms a part of the outer shell of the LED lamp 10, is exposed to the outside air, and the outer bottom surface is joined to the housing 4.
In addition, it is preferable that a gap is eliminated by applying heat-dissipating grease or heat conductive rubber between the inner bottom surfaces. Thereby, the heat generated in the LED element 1 is easily conducted to the heat radiating member 3 and is efficiently radiated.
筐体４は、放熱部材３よりも熱伝導性の小さな樹脂を用いて形成されている。本実施形態では、ガラス繊維強化ナイロンを使用したが、これに限定されるものではなく、ポリエチレンテレフタレート、ポリウレタン、ポリカーボネート、ポリフェニレンサルファイド、ポリアミドイミド、ポリイミド、ポリアミド、フェノール樹脂、アクリル樹脂等公知の樹脂材料や、これらにガラス繊維等を含有した強化樹脂が使用できる。
この筐体４は、一端部に径の大きな開口面が形成され、前記開口面から、前記口金螺合部に向けて外径が小さくなる、内部が中空な円筒形状に形成されている。
The housing 4 is formed using a resin having a smaller thermal conductivity than the heat radiating member 3. In this embodiment, glass fiber reinforced nylon is used, but the present invention is not limited to this, and known resin materials such as polyethylene terephthalate, polyurethane, polycarbonate, polyphenylene sulfide, polyamideimide, polyimide, polyamide, phenol resin, and acrylic resin are used. Alternatively, a reinforced resin containing glass fiber or the like can be used.
The housing 4 has an opening surface with a large diameter at one end, and has a hollow cylindrical shape with an outer diameter decreasing from the opening surface toward the cap screw portion.
電源基板５は、前記筐体中空部の断面形状に合わせた平板状のプリント基板であり、前記中空部に、口金７の回転軸線と、この電源基板５の長手方向とが平行になるように収納されている。 The power supply substrate 5 is a flat printed board that matches the cross-sectional shape of the casing hollow portion, and the rotation axis of the base 7 and the longitudinal direction of the power supply substrate 5 are parallel to the hollow portion. It is stored.
透光性カバー６は、ポリカーボネート樹脂を用いて、前記放熱部材との嵌合部６ａから頂部６ｄにかけて曲率が漸減するドーム形状に形成されている。この透光性カバー６の開口端部 に、放熱部材３の内径と略同じ寸法となるように一体に形成されたカバー嵌合部６ａの外周面に、環状のパッキンを挿入するための周溝６ｂが形成されている。前記透光性カバー６の嵌合部６ａから、頂部６ｄに向かって、前記カバー内周面にシボ加 工を施し、環状帯形状の光散乱領域６ｃを形成した。前記光散乱領域６ｃの帯幅を所望の 幅に形成することによって、ビーム角１１０度となるＬＥＤランプ１０を作成した。
また前記周溝６ｂにパッキンを挿入し、パッキンを潰しながらカバー嵌合部６ａを放熱 部材３の内側に嵌め込むことによって、透光性カバー６が固定されている。
The translucent cover 6 is formed using a polycarbonate resin in a dome shape in which the curvature gradually decreases from the fitting portion 6a to the top portion 6d with the heat radiating member . A circumferential groove for inserting an annular packing into the outer peripheral surface of the cover fitting portion 6a formed integrally with the opening end portion of the translucent cover 6 so as to have substantially the same size as the inner diameter of the heat radiating member 3 6b is formed. From the fitting portion 6a of the translucent cover 6 toward the top portion 6d, the cover inner peripheral surface was subjected to embossing to form an annular band-shaped light scattering region 6c. An LED lamp 10 having a beam angle of 110 degrees was formed by forming the band width of the light scattering region 6c to a desired width.
Further, the translucent cover 6 is fixed by inserting a packing into the circumferential groove 6b and fitting the cover fitting portion 6a inside the heat radiating member 3 while crushing the packing.
１：ＬＥＤ素子
２：ＬＥＤ基板
３：放熱部材
４：筐体
５：電源基板
６：透光性カバー、６ａ：カバー嵌合部、６ｂ：周溝、６ｃ：光散乱領域、６ｄ：頂部
７：口金
１０：ＬＥＤランプ
1: LED element 2: LED substrate 3: heat dissipation member 4: casing 5: power supply substrate 6: translucent cover, 6a: cover fitting portion, 6b: circumferential groove, 6c: light scattering region, 6d: top portion 7: Base 10: LED lamp
Claims (3)
一端面側に前記ＬＥＤ基板が設置された筐体と、
前記筺体に接合された放熱部材と、
前記ＬＥＤ素子を覆うように前記放熱部材の一端部に嵌め込まれたドーム形状の透光性カバーとからなり、
前記透光性カバーの前記放熱部材との嵌合部から頂部にかけての一部に光散乱領域を設けたことを特徴としたＬＥＤランプ An LED substrate on which an LED element is mounted;
A housing in which the LED substrate is installed on one end surface side;
A heat dissipating member joined to the housing;
It consists of a dome-shaped translucent cover fitted into one end of the heat dissipation member so as to cover the LED element,
An LED lamp characterized in that a light scattering region is provided in a part from the fitting part to the top part of the light transmissive cover with the heat radiating member.
前記環状帯形状の帯幅が、ビーム角に合わせて決定されていることを特徴とした請求項１に記載のＬＥＤランプ。 The translucent cover is formed in a dome shape in which a curvature gradually decreases from a fitting portion with the heat radiating member to a top portion, and a portion other than the light scattering region has a light scattering rate lower than that of the light scattering region. The scattering region is formed in an annular band shape from the entire peripheral end of the fitting portion with the heat dissipation member toward the top,
The LED lamp according to claim 1, wherein a band width of the annular band shape is determined in accordance with a beam angle.
前記筺体は、一端面側とは反対側に口金が配設され、
前記放熱部材は、一端面が開口した内部が中空な有底筒状体からなり、
前記放熱部材の内側の底面に、前記ＬＥＤ基板が載置され、 前記放熱部材の開口縁部に、前記透光性カバーが係合されており、
前記口金、前記筺体、前記放熱部材、前記透光性カバーが一端面側とは反対側から一端面側に向かって同順で位置していることを特徴とした請求項１または２に記載のＬＥＤランプ。 The heat dissipation member is disposed between the housing and the LED substrate,
The casing is provided with a base on the side opposite to the one end surface side,
The heat dissipating member is composed of a bottomed cylindrical body whose inside is open at one end face,
The LED substrate is placed on the bottom surface inside the heat radiating member, and the translucent cover is engaged with the opening edge of the heat radiating member,
The said base, the said housing, the said heat radiating member, and the said translucent cover are located in the same order toward the one end surface side from the opposite side to the one end surface side. LED lamp.
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| JP2012087108A JP6135897B2 (en) | 2012-04-06 | 2012-04-06 | LED lamp |
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| JP2012087108A JP6135897B2 (en) | 2012-04-06 | 2012-04-06 | LED lamp |
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| JP6135897B2 true JP6135897B2 (en) | 2017-05-31 |
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| JP4406854B2 (en) * | 2009-06-24 | 2010-02-03 | 東芝ライテック株式会社 | Light emitting element lamp and lighting apparatus |
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| JP5427294B2 (en) * | 2010-06-07 | 2014-02-26 | アイリスオーヤマ株式会社 | LED lamp |
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