JP4540256B2 - Translucent covering member for light source and light source provided with the covering member - Google Patents

Translucent covering member for light source and light source provided with the covering member Download PDF

Info

Publication number
JP4540256B2
JP4540256B2 JP2001159109A JP2001159109A JP4540256B2 JP 4540256 B2 JP4540256 B2 JP 4540256B2 JP 2001159109 A JP2001159109 A JP 2001159109A JP 2001159109 A JP2001159109 A JP 2001159109A JP 4540256 B2 JP4540256 B2 JP 4540256B2
Authority
JP
Japan
Prior art keywords
light source
covering member
thin film
light
coating material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2001159109A
Other languages
Japanese (ja)
Other versions
JP2002352609A (en
Inventor
宗次 土屋
和久 高木
益次 田崎
Original Assignee
株式会社ファインラバー研究所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ファインラバー研究所 filed Critical 株式会社ファインラバー研究所
Priority to JP2001159109A priority Critical patent/JP4540256B2/en
Publication of JP2002352609A publication Critical patent/JP2002352609A/en
Application granted granted Critical
Publication of JP4540256B2 publication Critical patent/JP4540256B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Description

【0001】
【発明の属する技術分野】
本発明は、タングステンランプや発光ダイオード(以下、LEDという)等の光源の色調や発光波長を変換するために、光源の発光側に配置されるフィルターやキャップ等の透光性の被覆部材、及び被覆材を備えた光源に関するものである。
【0002】
【従来の技術】
一般に、色調の異なる光を得る場合は、光源の光にフィルターをかけて行うか赤色LEDチップ、緑色LEDチップ、青色LEDチップを組み合わせる。また、最近は、380nm発光の紫外LEDを用いて、赤色、緑色、青色発光の蛍光体を用いて様々な色調の光を得ることが提案されている。光源の前面にフィルターを置く形のものは、光吸収材、光蛍光材などをガラスや、高分子の媒体などに分散したもの、基板に塗布したりしたものを配置する。構成としては、最も単純なもので、低コストで作製できる。無機系蛍光体や顔料を用いたもので、これを樹脂、ゴムに分散させたものが一部実用化されている。
【0003】
しかし、用いる樹脂、ゴムにより顔料、蛍光体の安定性が異なる。有機系の顔料、蛍光体の分子、粒子は特に、樹脂やゴム内で動きやすく、温度や湿度などの環境変化により、容易に表面に析出してしまう場合がある。特に、ゴムを用いた場合、また分散するものとして、分子状に分散されている染料などは、特に、動きやすく、表面に析出しやすい。分散に用いられる樹脂やゴムとしては、透光性や分散のしやすさ、耐光性などの特性より、シロキサンゴム、アクリル樹脂あるいはこれらを主体とした混合物が用いられている。
【0004】
【発明が解決しようとする課題】
以上述べてきたように、波長変換や色調変化を目的として、光源の発光側の位置に光吸収体や蛍光体が樹脂中に分散された方法では、特に有機蛍光体や顔料、染料を用いた場合、有機蛍光体や顔料、染料などの分子や粒子が分散膜中や基板中に移動したりして特性が劣化してしまう。特に染料は、高分子材料中に分散した場合、表面に析出しやすい。分散した染料を樹脂やゴム中に固定化のために、顔料や染料と高分子に互いに反応するような反応基を設けて、反応させる方法も提案されているが、顔料や染料の光特性が変化してしまったりして、再現性よく作製するのがむずかしい。一般に、有機系顔料、染料、特に染料は、寿命、安定性などが悪いとされており、樹脂、ゴム中に分散されているものが、時間が経過するに応じて表面に析出してしまう現象が出る。
【0005】
本発明は、上記した従来の技術が有する問題点に鑑みてなされたもので、蛍光体、顔料、染料などの表面析出現象が非常に少なく、長期に亘って安定した色調、波長変換が維持される信頼性のある光源用透光性被覆材を提供することを目的とする。また、他の目的は長期に亘って安定した色調、波長変換が維持できる被覆材を備えた光源を提供する。
【0006】
【課題を解決するための手段】
本発明は、上記目的を達成する為に、本発明の光源用透光性被覆材は、光源の発光側を被い透光性を有する被覆部材であって、前記光源の表面に密着可能なゴム材料からなり、内部に蛍光体,顔料又は染料が分散された被覆材と、前記被覆材の表面に形成され前記被覆材と前記光源の表面との間に介在して、前記蛍光体,顔料又は染料の析出を抑制する表面薄膜とを備えることを特徴とする。上記被覆材の形態としては、フィルターの場合はシート状、発光ダイオードの表面に被せるキャップ形態等、何れでもよい薄膜を作製する条件としては、被覆材を構成するゴムの変形が膜質に悪影響しない条件、あるいは顔料や蛍光体粉末の性質が変化しない条件で製膜をする。例えば、熱に関しては、常温での製膜で付着性が良好なものであることが望ましい。一般的な蒸着法により、金属を蒸着した場合は、ゴムとの付着性が弱く、蒸着膜がゴムの変形等により簡単に剥離してしまう。そのために、薄膜材料と薄膜を作製する方法は、高分子材料、ゴム材料等に応じて選択しなければならない。
【0007】
本発明で使用する薄膜形成材料としては、金属酸化物、金属窒化物、芳香族系有機化合物が好適である(請求項2、3)。その薄膜の製法としては、蒸着法、スパッター法、イオンプレーティング法、CVD法等が使用可能である。金属酸化物、金属窒化物、有機芳香族化合物の薄膜は、ゴムとの付着強度が強く、多少のゴムの変形があっても、薄膜が破壊することが少なく、薬液に対する溶出現象も少ないなど耐環境性が高い。薄膜の製法としては、薄膜がゴムの表面の凹凸の大小に関わらず、狭い空間に、膜が形成されやすいのは、蒸着法よりは、スパッター法、イオンプレーティング法、CVD法である。薄膜材料として、望ましい金属酸化物としては、Si、Al、Ti、Zn、In、Snの酸化物である(請求項5)。金属窒化物としては、Al、Ti、Siの窒化物である(請求項6)。金属フッ化物としては、Ca、Mgの化合物が挙げられる(請求項7)。芳香環、複素環を有する有機化合物としては、フタロシアニン系、ポリフィリン系化合物、ポリパラキシリレン系化合物などである。
【0008】
薄膜の効果的な膜厚は、物質によるが、0.01μmから1.0μm程度である(請求項8)。膜厚、製膜条件によっては、薄膜がひび割れしたり、剥離現象が生じてしまう。従って、使用する高分子材料、ゴムにより薄膜材料、薄膜製法、特に表面処理法での薄膜材料は一般的にシラン化合物の表面上では、良好な成膜性を有する。従って、予め、シラン化合物などで表面処理等を行っておくことは、目的上、効果的である。
【0009】
又、顔料や蛍光体粉末の表面に予め薄膜を設けた後、これを被覆材の材料に分散して被覆材を形成してもよい(請求項9)。分散する顔料、蛍光体の粉末の表面に予め表面処理として薄膜を設けると高分子材料やゴム中での分散状態の安定がよくなる。特に、顔料や蛍光体と分散するゴムとのぬれ性などが悪い時に、効果的である。また、表面特に凹凸が激しい場合、いいかえれば、比表面積が大きい場合に、顔料や蛍光体の表面への析出現象の低減に効果的である。
【0010】
本発明で被覆材に使用するゴムはシリコーン系ゴムなどを用いることができる。又、本発明の被覆材が使用対象とする光源としては、通常のタングステンランプ、LEDランプなどが挙げられる。顔料や蛍光体を含有した被覆材が、キャップ状の時は、LEDに組み合わせればよい。シート状の時は、そのシート物を光源の表面に設置すればよい。
【0011】
本発明の光源用透光性被覆材は、光源の発光側の位置に設ける、波長変換、色調変換を目的とした、蛍光体、顔料、染料を混入したゴムからなる被覆材(シートあるいはキャップ)の表面に、スパッター法、蒸着法、イオンプレーティング法、CVD法のいずれかの方法で、有機又は無機の薄膜を設けたものであり、それにより、外部環境からの水分などの影響を抑え、被覆材表面へ蛍光体、顔料、染料等が析出するのを抑制し、色調の種類の増大、色ずれの少ない信頼性の高い照明装置の提供が可能となる。
【0012】
そして、前記薄膜として金属酸化物、金属窒化物、金属フッ化物(請求項2)、或いは芳香族系有機化合物、複素環有機化合物(請求項3)、ポリマー構造の主鎖に芳香族を含む高分子化合物であり、ポリパラキシリレン(請求項4)とした場合は、ゴムとの付着強度が強く、多少のゴムの変形により、薄膜が破壊することが少なく、薬液に対する溶出現象も少なく、耐環境性に優れた信頼性の向上した照明装置の提供が可能となる。
【0013】
又、前記薄膜の膜厚を、0.01μm〜1.0μmの範囲(請求項8)とすることで、薄膜がひび割れしたり、剥離するのを防止できる。更に、光源の発光側の位置に設けられ被覆材に混入する顔料あるいは蛍光体粉末の表面に、予めスパッター法、蒸着法、イオンプレーティング法、CVD法のいずれかの方法で、有機又は無機の薄膜を設けた後、これを被覆材を構成するゴム材に分散をさせた場合(請求項9)は、請求項1と同様、信頼性などの特性の向上が図られた照明装置の提供が可能となる。また、表面に薄膜を設けた被覆材を発光側に配置した光源(請求項10)は、長期に亘って安定した色調変換を維持することが出来る。
【0014】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づき説明する。図1は、光源がリードタイプの発光ダイオード(LED)である光源を示し、図中、1はリードタイプの発光ダイオードからなる光源、2は前記光源1の表面に被着したキャップ形態の被覆材、3は前記被覆材2の外側表面及び内側表面に被着形成した薄膜である。光源1の発光ダイオードは今日周知のもので、赤色LEDチップ、緑色LEDチップ、青色LEDチップ、或いは380nm発光の紫外LEDチップ等が用いられる。
【0015】
被覆材2は、耐熱性、透明性に優れたシリコーンゴムを素材とし、これに色調変化や波長変換を目的として蛍光体、顔料、染料を混合し、前記した光源1に被せることが出来るキャップ形状に形成されている。素材のシリコーンゴムに添加する蛍光体は、Y(イットリウム)がGd(ガドリニウム)で置換されたイットリウム・アルミニウム酸化物で、一般式(Y、Gd)3Al512:Ceで表される蛍光体を使用する。又、素材のシリコーンゴムに添加する蛍光体、顔料、染料の量は適宜決定する。
【0016】
上記被覆材2の外側表面及び内側表面に被着形成する薄膜3は、金属酸化物、金属窒化物、金属フッ化物、芳香族系有機化合物、複素環有機化合物、或いはポリマー構造の主鎖に芳香族を含む高分子化合物であり、ポリパラキシリレンから作製されるもので、前記した被覆材2に応じて適宜選択される。金属酸化物としては、Si、Al、Ti、Zn、In、Snの酸化物から選択し、金属窒化物としては、Al、Ti、Siの窒化物から選択し、金属フッ化物としてはCa、Mg化合物から選択使用する。芳香環、複素環を有する有機化合物としては、フタロシアニン系、ポリフィリン系化合物、ポリパラキシリレン系化合物を使用する。
【0017】
上記薄膜形成材料は被覆材2の材料に応じて選択し、その選択した材料による薄膜形成は、その材料と被覆材との組み合わせによって蒸着法、スパッター法、イオンプレーティング法、CVD法から最適な方法を選択して製膜する。又、薄膜3の膜厚は薄膜形成材料によるが、0.01μmから1.0μm程度が効果的である。
【0018】
図2は、請求項9に対応する実施の形態を示し、被覆材2のシリコーンゴム中に添加混合する顔料、蛍光体の粉末4の表面を、前記した薄膜3の製法と同様の方法、即ち、蒸着法、スパッター法、イオンプレーティング法、CVD法から最適な方法を選択して薄膜5でコーティングし、表面を薄膜5でコーティングした顔料、蛍光体の粉末4を被覆材の材料中に混合して、被覆材6をキャップ形状に形成したものである。尚、図1に示した部材と同じ部材は同一の符号を付し、説明を省略する。
【0019】
【実施例】
以下に、本発明の実施例を示す。
(実施例1)被覆材はシリコ−ンゴムを用い、これに添加する染料として林原生物化学研究所製のスチリル色素、シアニン色素、メロシアニン色素、顔料としてはバイエル社製アゾ顔料、ペリレン顔料を用いた。又、有機蛍光体としては、林原生物化学研究所製クマリン系色素を用いた。染料や前記の有機顔料は、被覆材に対して0.5重量%を均一に添加して成形し、この被覆材について信頼性試験を行った。信頼性試験の内容は、80℃で恒温放置し、被覆材表面の変化を測定する。表面に薄膜をコーティング処理しない場合の被覆材は、80℃で恒温放置をすると、染料、顔料は1日以内で被覆材の表面に析出してしまい、被覆材内部には、染料、顔料が存在しなくなってしまう。一方、上記構造の被覆材の外側表面及び内側表面に薄膜として、AlN膜、SiO2膜はスパッター法で、ポリパラキシリレンをCVD法で厚み1.0μmを形成し、これを同様に80℃下に恒温放置試験を行った。表面に薄膜を形成したものは、1ヶ月放置しても、染料、顔料は表面に析出せず、何の変化も見られなかった。
【0020】
(実施例2)
又、バイエル社製のペリレン顔料を前記と同様にシリコーンゴムに1重量%を分散したものに、薄膜としてMgF2、CaF2を膜厚0.5μmで蒸着形成した。これを80℃下に恒温放置したところ、前記実施例1の薄膜を形成したものと同様、初期からの特別な劣化現象は観察されなかった。
【0021】
(実施例3)
前記の染料を同様に、シリコーンゴムに0.2重量%を分散して被覆材を形成し、その被覆材の表面に薄膜としてSiO2膜を2.0μmほどの厚みで形成した。これを同様に80℃で、恒温放置試験を行った。この場合、被覆材がシリコーンゴム以外の樹脂の場合、薄膜のSiO2膜にクラックが生じやすく、一週間内で染料が表面に析出し、飛散してしまう現象が見られた。しかし、被覆材がシリコーンゴムの場合は、クラック現象は見られるが、試験結果としては、大きな変化もなく良好であった。
【0022】
(実施例4)
前記の赤系のペリレン顔料を、同様にシリコーンゴムに0.2重量%分散して被覆材を形成し、その被覆材の表面に薄膜としてポリスルホン、ポリエーテルスルホンを、それぞれ膜厚1.0μmに蒸着法で作製した。これを、同様に、80℃で、恒温放置試験を行った。その結果、顔料の表面析出現象は見られなかった。
【0023】
(実施例5)
前記した実施例1〜4に記載した被覆材を、タングステンランプ、発光ダイオード(LED)等の光源の前面に設置して、連続点灯の信頼性実験を行ったところ、被覆材の表面に薄膜を形成していないものは、80℃放置試験の場合と同様に、一週間以内で劣化してしまい、着色光あるいは発光色の色が褪せて、なくなってしまった。他方、被覆材の表面に薄膜を形成したものは、一ヶ月間たっても何の劣化現象も見られず、安定した着色、発光が維持された。
【0024】
【発明の効果】
本発明の光源用透光性被覆材は、被覆材中に分散された顔料、染料、蛍光体が被覆材の表面に析出する現象を抑制でき、それにより長期に亘って安定した色調、波長変換を維持でき、安定した着色、発光が可能な信頼性のある照明装置(光源)を提供できる。又、被覆材の表面に形成する薄膜の膜厚を、0.01μm〜1.0μmとした場合は、上記薄膜のひび割れ、剥離現象を防止することができる。更に、被覆材に分散する顔料、蛍光体の表面に予め表面処理として薄膜を形成することで、被覆材を構成するゴム材中での分散状態が安定し、被覆材表面への析出現象の低減に効果的に作用し、安定した着色、発光が可能な信頼性のある光源を提供できる。従って、有機顔料、染料が実用可能となると共に、用いられる有機材料の多様性により、光源の波長変換や色調変化を幅広く、様々に効率よく実現できる。因って、光源(照明装置)としても特徴のあるものを提供することが可能となる。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a translucent covering member such as a filter or a cap disposed on the light emission side of a light source in order to convert the color tone or light emission wavelength of a light source such as a tungsten lamp or a light emitting diode (hereinafter referred to as LED), and it relates light source with the covering member.
[0002]
[Prior art]
In general, when obtaining light having different color tones, a filter is applied to light from a light source, or a red LED chip, a green LED chip, and a blue LED chip are combined. Recently, it has been proposed to obtain light of various colors using phosphors emitting red, green and blue light using an ultraviolet LED emitting 380 nm. In the type in which a filter is placed in front of the light source, a light absorbing material, a light fluorescent material or the like dispersed in glass or a polymer medium, or a material coated on a substrate is arranged. The configuration is the simplest and can be manufactured at low cost. Some inorganic phosphors and pigments that are dispersed in resin and rubber have been put into practical use.
[0003]
However, the stability of pigments and phosphors varies depending on the resin and rubber used. In particular, organic pigments, phosphor molecules, and particles are easy to move within a resin or rubber, and may easily deposit on the surface due to environmental changes such as temperature and humidity. In particular, when rubber is used, the dye dispersed in the form of molecules as a dispersion is particularly easy to move and deposit on the surface. As the resin or rubber used for dispersion, siloxane rubber, acrylic resin, or a mixture mainly composed of these is used in view of characteristics such as translucency, ease of dispersion, and light resistance.
[0004]
[Problems to be solved by the invention]
As described above, organic phosphors, pigments, and dyes are particularly used in the method in which the light absorber and phosphor are dispersed in the resin at the light emission side position for the purpose of wavelength conversion and color change. In such a case, molecules or particles such as organic phosphors, pigments, and dyes move into the dispersion film or the substrate, resulting in deterioration of characteristics. In particular, the dye is likely to be deposited on the surface when dispersed in the polymer material. In order to immobilize the dispersed dye in resin or rubber, a method has been proposed in which a reactive group that reacts with the pigment or dye and the polymer is set to react with each other. It is difficult to produce with good reproducibility due to changes. In general, organic pigments and dyes, especially dyes, are said to have poor life and stability, etc., and those that are dispersed in resins and rubbers are deposited on the surface over time. coming out.
[0005]
The present invention has been made in view of the above-described problems of the prior art, and the surface precipitation phenomenon of phosphors, pigments, dyes and the like is very small, and stable color tone and wavelength conversion are maintained over a long period of time. An object of the present invention is to provide a reliable light-transmitting coating material for a light source. Another object of the present invention is to provide a light source including a coating material capable of maintaining stable color tone and wavelength conversion over a long period of time.
[0006]
[Means for Solving the Problems]
The present invention, in order to achieve the above object, a light source for translucent covering member of the present invention is a covering member having a light-transmitting covering the emission side of the light source, can close contact with the surface of the light source A coating material in which phosphors, pigments or dyes are dispersed inside, and the phosphor formed on the surface of the coating material and interposed between the coating material and the surface of the light source, And a surface thin film that suppresses precipitation of pigments or dyes . The form of the covering member, if the filter sheet, cap-like covering on the surface of the light-emitting diodes, may be any. The conditions for making a thin film, the film under the condition that condition deformation of Lugo arm make up the coating material does not adversely affect the quality or properties of the pigment and the phosphor powder, does not change. For example, regarding heat, it is desirable that the film is formed at room temperature and has good adhesion. When metal is vapor-deposited by a general vapor deposition method, adhesion to rubber is weak, and the vapor-deposited film is easily peeled off due to deformation of the rubber. Therefore, a thin film material and a method for producing the thin film must be selected according to a polymer material, a rubber material, and the like.
[0007]
As the thin film forming material used in the present invention, metal oxides, metal nitrides, and aromatic organic compounds are suitable (claims 2 and 3). As a method for producing the thin film, a vapor deposition method, a sputtering method, an ion plating method, a CVD method, or the like can be used. Metal oxide, metal nitride, and organic aromatic compound thin films have strong adhesion strength to rubber, and even if there is some deformation of the rubber, the thin film is less likely to break down, and there is little elution phenomenon against chemicals. High environmentality. As a method for producing a thin film, it is the sputtering method, the ion plating method, and the CVD method that make it easier to form a film in a narrow space regardless of the unevenness of the rubber surface. As a thin film material, a desirable metal oxide is an oxide of Si, Al, Ti, Zn, In, or Sn. The metal nitride is a nitride of Al, Ti, or Si (Claim 6). Examples of the metal fluoride include compounds of Ca and Mg. Examples of the organic compound having an aromatic ring or a heterocyclic ring include phthalocyanine-based compounds, polyphyllin-based compounds, and polyparaxylylene-based compounds.
[0008]
Although the effective film thickness of the thin film depends on the substance, it is about 0.01 μm to 1.0 μm. Depending on the film thickness and film forming conditions, the thin film may crack or cause a peeling phenomenon. Therefore, a thin film material, a thin film manufacturing method, particularly a thin film material obtained by a surface treatment method, generally has a good film forming property on the surface of a silane compound. Therefore, it is effective for the purpose to perform surface treatment with a silane compound or the like in advance.
[0009]
Alternatively, a thin film may be provided in advance on the surface of the pigment or phosphor powder and then dispersed in the material of the coating material to form a coating material. If a thin film is provided as a surface treatment in advance on the surface of the pigment or phosphor powder to be dispersed, the dispersion state in the polymer material or rubber is improved. In particular, when there is bad, such as wettability of the Lugo-time be dispersed with the pigment and phosphor, it is effective. Further, when the surface is particularly uneven, in other words, when the specific surface area is large, it is effective for reducing the precipitation phenomenon on the surface of the pigment or phosphor.
[0010]
As the rubber used for the covering material in the present invention, silicone rubber or the like can be used. Moreover , as a light source which the coating | covering material of this invention uses, a normal tungsten lamp, an LED lamp, etc. are mentioned. What is necessary is just to combine with LED, when the coating material containing a pigment and fluorescent substance is a cap shape. In the case of a sheet, the sheet may be placed on the surface of the light source.
[0011]
This onset bright light source for the light-transmitting covering section member is provided on the light emission side of the position of the light source, the wavelength conversion, the color tone conversion aimed phosphor, pigments, coating materials made of rubber obtained by mixing a dye ( the surface of the sheet or cap), sputtering method, an evaporation method, an ion plating method, by using one or more of the CVD method, and than ash provided a thin film of organic or inorganic, whereby the moisture from the external environment It is possible to suppress the influence and suppress deposition of phosphors, pigments, dyes, and the like on the surface of the coating material, and to provide a highly reliable lighting device with increased color tone and less color shift.
[0012]
And as said thin film, a metal oxide, a metal nitride, a metal fluoride (Claim 2), or an aromatic organic compound, a heterocyclic organic compound (Claim 3), and a polymer structure containing a high aromatic content When it is a molecular compound and polyparaxylylene (Claim 4), the adhesion strength to rubber is strong, the thin film is less likely to break due to some deformation of the rubber, the elution phenomenon to the chemical solution is small, It is possible to provide an illuminating device with excellent environmental characteristics and improved reliability.
[0013]
Moreover, it can prevent that a thin film cracks or peels by making the film thickness of the said thin film into the range of 0.01 micrometer-1.0 micrometer (Claim 8). Furthermore, the surface of the pigment or phosphor powder mixed in the coating material provided at the light emitting side of the light source is preliminarily made of organic or inorganic by any of sputtering, vapor deposition, ion plating, and CVD methods. after providing the thin film, which if the were distributed in Lugo arm member make up the coating material (claim 9), same as defined in claim 1, the illumination device improved properties such as reliability is achieved Provision is possible. Moreover, the light source (Claim 10) in which the covering material provided with a thin film on the surface is arranged on the light emitting side can maintain stable color tone conversion over a long period of time.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a light source in which the light source is a lead type light emitting diode (LED). In the figure, 1 is a light source comprising a lead type light emitting diode, and 2 is a covering material in the form of a cap attached to the surface of the light source 1. Reference numeral 3 denotes a thin film deposited on the outer surface and the inner surface of the covering material 2. The light emitting diodes of the light source 1 are well known today, and red LED chips, green LED chips, blue LED chips, ultraviolet LED chips emitting 380 nm, or the like are used.
[0015]
The covering material 2 is made of a silicone rubber excellent in heat resistance and transparency, and is mixed with phosphors, pigments and dyes for the purpose of color change and wavelength conversion, and can be covered with the light source 1 described above. Is formed. The phosphor added to the raw material silicone rubber is an yttrium-aluminum oxide in which Y (yttrium) is substituted with Gd (gadolinium), and the fluorescence represented by the general formula (Y, Gd) 3 Al 5 O 12 : Ce. Use the body. The amount of phosphor, pigment, and dye added to the raw material silicone rubber is appropriately determined.
[0016]
The thin film 3 deposited on the outer surface and the inner surface of the covering material 2 has a metal oxide, a metal nitride, a metal fluoride, an aromatic organic compound, a heterocyclic organic compound, or an aromatic main chain of a polymer structure. It is a polymer compound containing a group and is made from polyparaxylylene, and is appropriately selected according to the covering material 2 described above. The metal oxide is selected from oxides of Si, Al, Ti, Zn, In, and Sn, the metal nitride is selected from nitrides of Al, Ti, and Si, and the metal fluoride is Ca, Mg. Select from compounds. As the organic compound having an aromatic ring or a heterocyclic ring, a phthalocyanine-based compound, a porphyrin-based compound, or a polyparaxylylene-based compound is used.
[0017]
The thin film forming material is selected according to the material of the coating material 2, and the thin film formation by the selected material is optimal from the vapor deposition method, the sputtering method, the ion plating method, and the CVD method depending on the combination of the material and the coating material. Select a method to form a film. The film thickness of the thin film 3 depends on the thin film forming material, but about 0.01 μm to 1.0 μm is effective.
[0018]
FIG. 2 shows an embodiment corresponding to claim 9, and the surface of the pigment 4 and the phosphor powder 4 to be added and mixed in the silicone rubber of the covering material 2 is formed by the same method as the method of manufacturing the thin film 3 described above. The optimum method is selected from vapor deposition, sputtering, ion plating, and CVD, and coated with the thin film 5, and the pigment coated with the thin film 5 and the phosphor powder 4 are mixed into the coating material. Then, the covering material 6 is formed in a cap shape. In addition, the same member as the member shown in FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits description.
[0019]
【Example】
Examples of the present invention are shown below.
(Example 1) dressing sheet Rico - use with Ngomu, Hayashibara Biochemical Laboratories Ltd. styryl dye as the dye to be added thereto, cyanine dyes, merocyanine dyes, Bayer azo pigment as the pigment, a perylene pigment It was. Further, as the organic phosphor, a coumarin-based dye manufactured by Hayashibara Biochemical Research Institute was used. The dye and the organic pigment were molded by uniformly adding 0.5% by weight to the coating material, and a reliability test was performed on the coating material. The content of the reliability test is a constant temperature standing at 80 ° C., and the change of the coating material surface is measured. If the coating material is not coated with a thin film on the surface, the dye and pigment will be deposited on the surface of the coating material within one day if left at 80 ° C, and there will be dye and pigment inside the coating material. I will not. On the other hand, as a thin film on the outer surface and inner surface of the coating material having the above structure, an AlN film and an SiO 2 film are formed by sputtering, and polyparaxylene is formed by CVD with a thickness of 1.0 μm. A constant temperature test was performed below. In the case where the thin film was formed on the surface, the dyes and pigments were not deposited on the surface even when left for one month, and no change was observed.
[0020]
(Example 2)
Also, the Bayer perylene pigment obtained by dispersing 1% by weight similarly to the silicone rubber was a MgF 2, CaF 2 is deposited formed to a thickness of 0.5μm as a thin film. When this was allowed to stand at 80 ° C., no special deterioration phenomenon from the initial stage was observed as in the case where the thin film of Example 1 was formed.
[0021]
(Example 3)
Like the dye, by dispersing 0.2% by weight silicone rubber to form a coating material, and the SiO 2 film was formed to a thickness of about 2.0μm as a thin film on the surface of the coating material. This was similarly subjected to a constant temperature test at 80 ° C. In this case, when the coating material was a resin other than silicone rubber, cracks were likely to occur in the thin SiO 2 film, and the phenomenon that the dye was deposited on the surface and scattered within one week was observed. However, when the coating material was silicone rubber, cracking was observed, but the test results were good with no significant changes.
[0022]
Example 4
Similarly, 0.2% by weight of the above-mentioned red perylene pigment is dispersed in silicone rubber to form a coating material. Polysulfone and polyethersulfone are formed on the surface of the coating material as a thin film with a thickness of 1.0 μm, respectively. It was produced by a vapor deposition method. Similarly, this was subjected to a constant temperature test at 80 ° C. As a result, no pigment surface precipitation phenomenon was observed.
[0023]
(Example 5)
When the covering materials described in Examples 1 to 4 were installed on the front surface of a light source such as a tungsten lamp or a light emitting diode (LED) and a reliability experiment for continuous lighting was performed, a thin film was formed on the surface of the covering material. Those that were not formed deteriorated within one week, as in the case of the 80 ° C. standing test, and the colored light or emission color faded and disappeared. On the other hand, in the case where a thin film was formed on the surface of the covering material, no deterioration phenomenon was observed even after one month, and stable coloring and light emission were maintained.
[0024]
【The invention's effect】
Light source translucent covering member of the present invention, pigment dispersed in the coating material, it is possible to suppress the phenomenon that the dye, the phosphor deposited on the surface of the coating material, stable color tone whereby a long period of time, wavelength It is possible to provide a reliable lighting device (light source) capable of maintaining conversion and capable of stable coloring and light emission. Moreover, when the film thickness of the thin film formed on the surface of the coating material is 0.01 μm to 1.0 μm, the thin film can be prevented from cracking and peeling. Furthermore, pigment dispersed in the coating material, by forming a thin film as previously surface treatment on the surface of the phosphor, the dispersion state in a Lugo arm member make up the coating material is stable, precipitation phenomenon of the coating material surface It is possible to provide a reliable light source that can effectively reduce the amount of light and can stably color and emit light. Therefore, organic pigments and dyes can be used practically, and the wavelength conversion and color tone change of the light source can be widely and efficiently realized in various ways by the variety of organic materials used. Therefore, it is possible to provide a characteristic light source (illumination device).

Claims (10)

光源の発光側を被い透光性を有する被覆部材であって、
前記光源の表面に密着可能なゴム材料からなり、内部に蛍光体,顔料又は染料が分散された被覆材と、
前記被覆材の表面に形成され前記被覆材と前記光源の表面との間に介在して、前記蛍光体,顔料又は染料の析出を抑制する表面薄膜とを備えることを特徴とする光源用透光性被覆材。
A covering member that covers the light emitting side of the light source and has translucency,
A rubber material that can adhere to the surface of the light source, and a coating material in which phosphors, pigments, or dyes are dispersed;
A light-transmitting light source comprising: a surface thin film formed on a surface of the covering material and interposed between the covering material and the surface of the light source to suppress precipitation of the phosphor, pigment or dye sexual covering member.
前記表面薄膜が、金属酸化物、金属窒化物、あるいは金属フッ化物の何れかであることを特徴とする請求項1に記載の光源用透光性被覆材。Said surface film is a metal oxide, metal nitride, or a light source for translucent covering member according to claim 1, characterized in that any one of the metal fluoride. 前記表面薄膜が、芳香族系有機化合物、或いは複素環有機化合物から作製されることを特徴とする請求項1に記載の光源用透光性被覆材。Wherein the surface film is an aromatic organic compound, or a light source for translucent covering member according to claim 1, characterized in that it is made from a heterocyclic organic compound. 前記表面薄膜が、ポリマー構造の主鎖に芳香族を含む高分子化合物であり、ポリパラキシリレンから作製されることを特徴とする請求項1に記載の光源用透光性被覆材。Said surface film is a polymer compound containing an aromatic in the main chain of the polymer structure, the light source translucent covering member according to claim 1, characterized in that it is made from poly-para-xylylene. 前記金属酸化物が、Si、Al、Ti、Zn、In、Snの酸化物から選ばれることを特徴とする請求項2に記載の光源用透光性被覆材。Wherein the metal oxide, Si, Al, Ti, Zn , In, the light source for the light-transmitting covering member according to claim 2, characterized in that it is selected from the oxides of Sn. 前記金属窒化物が、Al、Ti、Siの窒化物から選ばれることを特徴とする請求項2に記載の光源用透光性被覆材。The metal nitride, Al, Ti, the light source translucent covering member according to claim 2, characterized in that it is selected from the nitride of Si. 前記金属フッ化物が、Ca、Mgのフッ化物から選ばれることを特徴とする請求項2に記載の光源用透光性被覆材。The metal fluoride, Ca, light source translucent covering member according to claim 2, characterized in that it is selected from the fluorides of Mg. 前記表面薄膜の膜厚が0.01μm〜1.0μmの範囲である請求項1乃至7の何れか1項に記載の光源用透光性被覆材。Light source translucent covering member according to any one of claims 1 to 7 the thickness of the surface film is in the range of 0.01Myuemu~1.0Myuemu. 光源の発光側を被い透光性を有する被覆部材であって、
前記光源の表面に密着可能なゴム材料からなり、内部に蛍光体,顔料又は染料が分散された被覆材と、
前記蛍光体,顔料又は染料の表面に形成され前記蛍光体,顔料又は染料の析出を抑制する表面薄膜とを備えることを特徴とする光源用透光性被覆材。
A covering member that covers the light emitting side of the light source and has translucency,
A rubber material that can adhere to the surface of the light source, and a coating material in which phosphors, pigments, or dyes are dispersed;
The phosphor pigments or the phosphor is formed on the surface of the dye, the light source translucent covering member, characterized in that it comprises a suppressing surface thin film deposition of pigment or dye.
請求項1〜9のいずれかに記載された光源用透光性被覆部材が被覆された光源。 A light source coated with the light-transmitting covering member for a light source according to claim 1 .
JP2001159109A 2001-05-28 2001-05-28 Translucent covering member for light source and light source provided with the covering member Expired - Fee Related JP4540256B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001159109A JP4540256B2 (en) 2001-05-28 2001-05-28 Translucent covering member for light source and light source provided with the covering member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001159109A JP4540256B2 (en) 2001-05-28 2001-05-28 Translucent covering member for light source and light source provided with the covering member

Publications (2)

Publication Number Publication Date
JP2002352609A JP2002352609A (en) 2002-12-06
JP4540256B2 true JP4540256B2 (en) 2010-09-08

Family

ID=19002748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001159109A Expired - Fee Related JP4540256B2 (en) 2001-05-28 2001-05-28 Translucent covering member for light source and light source provided with the covering member

Country Status (1)

Country Link
JP (1) JP4540256B2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7465961B2 (en) 2003-03-25 2008-12-16 Sharp Kabushiki Kaisha Electronic equipment, backlight structure and keypad for electronic equipment
US7304694B2 (en) * 2005-01-12 2007-12-04 Cree, Inc. Solid colloidal dispersions for backlighting of liquid crystal displays
EP1860991B1 (en) 2005-03-01 2019-04-24 Masimo Laboratories, Inc. Noninvasive multi-parameter patient monitor
JP5840823B2 (en) * 2007-03-30 2016-01-06 株式会社朝日ラバー Lens and lighting apparatus having the same
US8374665B2 (en) 2007-04-21 2013-02-12 Cercacor Laboratories, Inc. Tissue profile wellness monitor
US20100123386A1 (en) 2008-11-13 2010-05-20 Maven Optronics Corp. Phosphor-Coated Light Extraction Structures for Phosphor-Converted Light Emitting Devices
TWI508331B (en) * 2008-11-13 2015-11-11 Maven Optronics Corp System and method for forming a thin-film phosphor layer for phosphor-converted light emitting devices and a thin-film phosphor layer for phosphor-converted light emitting device
US9839381B1 (en) 2009-11-24 2017-12-12 Cercacor Laboratories, Inc. Physiological measurement system with automatic wavelength adjustment
US8801613B2 (en) 2009-12-04 2014-08-12 Masimo Corporation Calibration for multi-stage physiological monitors

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5079379U (en) * 1973-11-24 1975-07-09
JPS5799758A (en) * 1980-12-12 1982-06-21 Nippon Telegr & Teleph Corp <Ntt> Semiconductor chip
JPS61226978A (en) * 1985-03-30 1986-10-08 Toshiba Corp Light-emitting element
JPS6236829A (en) * 1985-08-09 1987-02-17 Mitsubishi Electric Corp Resin-sealed semiconductor device
JPH034201A (en) * 1989-05-31 1991-01-10 Nidek Co Ltd Coating film for transparent base body
JPH0612906A (en) * 1992-03-16 1994-01-21 Yokohama Kiko Kk Luminaire suitable for art object, and the like
JPH09245511A (en) * 1996-03-12 1997-09-19 Idemitsu Kosan Co Ltd Fluorescent conversion filter and manufacture thereof
JPH10237502A (en) * 1997-02-20 1998-09-08 Nittetsu Mining Co Ltd Formation of coating film on surface of powder
JPH1135843A (en) * 1997-07-14 1999-02-09 Nittetsu Mining Co Ltd Cyan color-based pigment and its production
JP2000007764A (en) * 1998-06-19 2000-01-11 Nippon Zeon Co Ltd Cap for lamp and light implement
JP2000193809A (en) * 1998-10-23 2000-07-14 Matsushita Electric Works Ltd Light distribution control panel and apparatus using it
JP2000208818A (en) * 1999-01-13 2000-07-28 Asahi Rubber:Kk Light emitting device
JP2001072440A (en) * 1999-08-31 2001-03-21 Central Glass Co Ltd Formation of oxide film

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5079379U (en) * 1973-11-24 1975-07-09
JPS5799758A (en) * 1980-12-12 1982-06-21 Nippon Telegr & Teleph Corp <Ntt> Semiconductor chip
JPS61226978A (en) * 1985-03-30 1986-10-08 Toshiba Corp Light-emitting element
JPS6236829A (en) * 1985-08-09 1987-02-17 Mitsubishi Electric Corp Resin-sealed semiconductor device
JPH034201A (en) * 1989-05-31 1991-01-10 Nidek Co Ltd Coating film for transparent base body
JPH0612906A (en) * 1992-03-16 1994-01-21 Yokohama Kiko Kk Luminaire suitable for art object, and the like
JPH09245511A (en) * 1996-03-12 1997-09-19 Idemitsu Kosan Co Ltd Fluorescent conversion filter and manufacture thereof
JPH10237502A (en) * 1997-02-20 1998-09-08 Nittetsu Mining Co Ltd Formation of coating film on surface of powder
JPH1135843A (en) * 1997-07-14 1999-02-09 Nittetsu Mining Co Ltd Cyan color-based pigment and its production
JP2000007764A (en) * 1998-06-19 2000-01-11 Nippon Zeon Co Ltd Cap for lamp and light implement
JP2000193809A (en) * 1998-10-23 2000-07-14 Matsushita Electric Works Ltd Light distribution control panel and apparatus using it
JP2000208818A (en) * 1999-01-13 2000-07-28 Asahi Rubber:Kk Light emitting device
JP2001072440A (en) * 1999-08-31 2001-03-21 Central Glass Co Ltd Formation of oxide film

Also Published As

Publication number Publication date
JP2002352609A (en) 2002-12-06

Similar Documents

Publication Publication Date Title
TWI417487B (en) Color-stable phosphor converted led
JP4540256B2 (en) Translucent covering member for light source and light source provided with the covering member
CN1171321C (en) Lighting system
KR100703248B1 (en) Electric lamp
JP5221122B2 (en) Silicone resin base material
US20080252198A1 (en) Red Fluorescence Conversion Medium, Color Conversion Substrate Using Same and Light-Emitting Device
CN1860828A (en) Color conversion layer and light-emitting element
US20010007412A1 (en) Fluorescence-reddening membrane and red-emitting device using same
KR20080087026A (en) Oleds with increased light yield
TW200803600A (en) Light emitting device
CN104297984A (en) Color film substrate, manufacturing method thereof and liquid crystal display device
CN1249530A (en) Fluorescent lamp and illuminating attachment
CN102084716A (en) Organic el device and process for producing the organic EL device
CN101809467A (en) Reflective film, reflective film laminate, LED, organic EL display, and organic EL illuminating device
CN209182599U (en) A kind of eyeglass of anti-oxidant anti-blue light
CN108258100A (en) A kind of white light LEDs and its preparation method and application
CN108365076A (en) A kind of LED lights of specular removal, high color purity
TWI224295B (en) Color tunable panel of organic electroluminescent displays
CN110416258A (en) Display device and preparation method thereof
CN201114861Y (en) An organic electric-driven luminescent part for producing white light
CN109613716B (en) Anti-oxidation blue-light-proof patterned lens and preparation method thereof
TWI397542B (en) A color conversion film containing a conjugated polymer copolymer, and a polychromatic organic EL device using the same
CN109058933B (en) Prevent antifog compound lamp shade of blue light
JPH02288188A (en) Anti-weather organic dispersion type electroluminescent body
US20190376652A1 (en) Photo Luminescent Lighting Device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080516

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20080516

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20091211

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20091222

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100222

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100525

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100622

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130702

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees