JP3065544B2 - LED lamp with fluorescent agent - Google Patents
LED lamp with fluorescent agentInfo
- Publication number
- JP3065544B2 JP3065544B2 JP8326996A JP32699696A JP3065544B2 JP 3065544 B2 JP3065544 B2 JP 3065544B2 JP 8326996 A JP8326996 A JP 8326996A JP 32699696 A JP32699696 A JP 32699696A JP 3065544 B2 JP3065544 B2 JP 3065544B2
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent agent
- led lamp
- agent
- fluorescent
- light
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
Landscapes
- Led Device Packages (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＬＥＤランプに関す
るものであり、詳細には光の波長を長波長側にシフトす
る蛍光剤の性質を利用して樹脂ケース内に蛍光剤を混入
し、ＬＥＤチップの発光色を変換する構成としたＬＥＤ
ランプに係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED lamp, and more particularly, to an LED chip in which a fluorescent agent is mixed in a resin case utilizing the property of a fluorescent agent that shifts the wavelength of light to a longer wavelength side. LED that converts the color of light emitted
According to the lamp.
【０００２】[0002]
【従来の技術】従来のこの種の蛍光剤入りＬＥＤランプ
９０の構成の例を示すものが図４であり、リードフレー
ム９１にマウントされたＬＥＤチップ９２を覆うものと
して、例えばエポキシ樹脂で形成される樹脂ケース９３
には、蛍光剤９４を適宜重量比（例えば、０．３〜１．
５％）で混入しておくものである。2. Description of the Related Art FIG. 4 shows an example of the configuration of a conventional LED lamp 90 containing a fluorescent agent of this type. The LED lamp 90 is formed of, for example, an epoxy resin so as to cover an LED chip 92 mounted on a lead frame 91. Resin case 93
The weight ratio of the fluorescent agent 94 (for example, 0.3 to 1.
5%).
【０００３】上記のようにすることで、前記樹脂ケース
９３には全体に均一に蛍光剤９４が分散されたものとな
る。また、図示は省略するが樹脂ケース９３のＬＥＤチ
ップ９２の周辺のみに蛍光剤９４を集中的に高濃度で混
入したものもあり、この場合には樹脂ケース９３の形成
は蛍光剤９４が混入された中心部と、混入されない外周
部との二回に分けて行われる。[0003] By the above, the fluorescent agent 94 is uniformly dispersed throughout the resin case 93. Although not shown, a fluorescent agent 94 is concentrated at a high concentration only around the LED chip 92 of the resin case 93. In this case, the fluorescent agent 94 is mixed in the resin case 93. This is performed in two steps: a central portion and a peripheral portion that is not mixed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記し
た従来の構成の蛍光剤入りＬＥＤランプ９０において
は、混入された蛍光剤９４、特にこの蛍光剤９４が有機
蛍光剤である場合には、紫外光、可視光により変色或い
は退色を行うものとなる。従って、ＬＥＤチップ９２か
らの光により時間の経過と共に蛍光剤９４が劣化し、発
光色が次第にシフトしたり、光量が低下するなどの問題
点を生じている。However, in the above-described conventional LED lamp 90 containing a fluorescent material, the mixed fluorescent material 94, especially when the fluorescent material 94 is an organic fluorescent material, is not suitable for ultraviolet light. In this case, discoloration or fading is caused by visible light. Therefore, the fluorescent agent 94 is deteriorated with the passage of time due to the light from the LED chip 92, which causes problems such as a gradual shift in the emission color and a decrease in the amount of light.
【０００５】また、前記した蛍光剤９４の劣化は、太陽
光など外光によっても生じるものとなるので、例えば太
陽光が直射する場所などＬＥＤランプ９０が設置されて
いる環境条件によっては、ＬＥＤランプ９０を点灯しな
い状態においても蛍光剤９４が劣化し、上記と同様な問
題点を生じるものとなり、これらの点の解決が課題とさ
れるものと成っている。The deterioration of the fluorescent material 94 is also caused by external light such as sunlight. For example, depending on the environmental conditions in which the LED lamp 90 is installed, such as a place where the sunlight directly shines, the LED lamp 90 may be used. Even when 90 is not illuminated, the fluorescent agent 94 is deteriorated, causing the same problems as described above, and solving these points is an issue.
【０００６】[0006]
【課題を解決するための手段】本発明は前記した従来の
課題を解決するための具体的な手段として、樹脂ケース
の少なくとも一部に蛍光剤を混入して成る蛍光剤入りＬ
ＥＤランプにおいて、前記樹脂ケースには５〜２０ｗｔ
％の拡散剤が前記蛍光剤と共に混入されていることを特
徴とする蛍光剤入りＬＥＤランプを提供することで課題
を解決するものである。According to the present invention, as a specific means for solving the above-mentioned conventional problems, there is provided a fluorescent agent-containing L formed by mixing a fluorescent agent into at least a part of a resin case.
In the ED lamp, 5 to 20 wt.
The present invention solves the problem by providing an LED lamp containing a fluorescent agent, characterized in that% of the diffusing agent is mixed together with the fluorescent agent.
【０００７】[0007]
【発明の実施の形態】つぎに、本発明を図に示す実施形
態に基づいて詳細に説明する。図１に符号１で示すもの
は本発明に係る蛍光剤入りＬＥＤランプ（以下にＬＥＤ
ランプ１と略称する）であり、このＬＥＤランプ１はリ
ードフレーム２にマウントされたＬＥＤチップ３を蛍光
剤４が混入された樹脂ケース５で覆うものである点は従
来例のものと同様である。Next, the present invention will be described in detail based on an embodiment shown in the drawings. In FIG. 1, a lamp indicated by reference numeral 1 is an LED lamp containing a fluorescent agent according to the present invention (hereinafter referred to as LED
This LED lamp 1 is similar to that of the conventional example in that the LED chip 3 mounted on the lead frame 2 is covered with a resin case 5 in which a fluorescent agent 4 is mixed. .
【０００８】ここで、本発明においては、前記樹脂ケー
ス５に蛍光剤４と共に、拡散剤６を混入するものであ
り、この拡散剤６は例えば酸化マグネシウムなど白色の
微粉体（粒径≒１．６μm）であり、前記ＬＥＤチップ
３からの光、或いは、太陽光など樹脂ケース５内に侵入
する光を乱反射し拡散光とするものである。Here, in the present invention, a diffusing agent 6 is mixed with the fluorescent agent 4 in the resin case 5, and the diffusing agent 6 is a white fine powder such as magnesium oxide (particle size: ≒ 1. 6 μm), and diffusely reflects light from the LED chip 3 or light that enters the resin case 5 such as sunlight.
【０００９】図２に示すグラフは、ＬＥＤチップ３の点
灯時間に対するＬＥＤランプ１の輝度の低下率を示すも
のであり、図中に符号Ｄで示す曲線は樹脂ケース５に蛍
光剤４（０．７重量％）と拡散剤６（１３重量％）とを
混入したときの光度維持率曲線であり、符号Ｎで示す曲
線は樹脂ケース５に蛍光剤４（０．７重量％）のみを混
入したときの光度維持率曲線である。尚、参考までにＬ
ＥＤチップ３自体の光度維持率曲線Ｓも同時に記載して
ある。The graph shown in FIG. 2 shows the rate of decrease in the luminance of the LED lamp 1 with respect to the lighting time of the LED chip 3. The curve indicated by the symbol D in the figure shows the fluorescent agent 4 (0. 7% by weight) and the diffusing agent 6 (13% by weight) are mixed, and the curve indicated by reference numeral N is a curve in which only the fluorescent agent 4 (0.7% by weight) is mixed into the resin case 5. It is a luminous intensity maintenance rate curve at the time. For reference, L
The luminous intensity maintenance rate curve S of the ED chip 3 itself is also described.
【００１０】ここで、蛍光剤４のみの光度維持率曲線Ｎ
と、拡散剤６入りの光度維持率曲線Ｄとを比較検討して
みると、拡散剤６入りの光度維持率曲線Ｄにおいては１
２０時間が経過した後の光度維持率は略８２％を維持す
るものとなっている。これに対し、蛍光剤４のみの光度
維持率曲線Ｎでは僅かに３０時間程度を経過した時点で
光度維持率は同程度となり、これによれば拡散剤６を添
加することで、同じ減衰値を設定した場合には略４倍の
寿命が得られるものとなる。Here, the luminous intensity maintenance ratio curve N of only the fluorescent agent 4 is shown.
And a light intensity maintenance rate curve D containing the diffusing agent 6, the light intensity maintenance rate curve D containing the diffusing agent 6 shows 1
The luminous intensity maintenance ratio after approximately 20 hours has been maintained at approximately 82%. On the other hand, in the luminous intensity maintenance ratio curve N of the fluorescent agent 4 alone, the luminous intensity maintenance ratio becomes approximately the same after a lapse of only about 30 hours. According to this, by adding the diffusing agent 6, the same attenuation value is obtained. When set, the life is almost four times as long.
【００１１】また、図３に示すグラフは、拡散剤６の混
入比を変化させ、それぞれの混入比のＬＥＤランプ１に
対し所定時間（１２０時間）点灯を継続した後の光度維
持率Ｈの相違を測定したものであり、この測定結果によ
れば拡散剤６は混入比が多いほどに高い光度維持率を示
し、蛍光剤４に対する延命に効果的であることが明らか
である。The graph shown in FIG. 3 shows the difference in the luminous intensity maintenance ratio H after changing the mixing ratio of the diffusing agent 6 and continuing to light the LED lamps 1 of each mixing ratio for a predetermined time (120 hours). According to the measurement results, it is clear that the higher the mixing ratio of the diffusing agent 6 is, the higher the luminous intensity maintaining ratio is, and that the diffusing agent 6 is effective in extending the life of the fluorescent agent 4.
【００１２】但し、混入比が５％以下である範囲ではそ
の効果は急速に失われるものとなり、また、発明者によ
る実験の結果では混入比が２０％を越えると、拡散剤６
による遮蔽作用などにより外部に放射されるＬＥＤラン
プ１としての光度が損なわれるものと成るので、混入比
は５〜２０％の範囲とすることが好ましい。However, the effect is rapidly lost in the range where the mixing ratio is 5% or less, and when the mixing ratio exceeds 20% as a result of experiments by the inventors, the diffusing agent 6
Since the luminous intensity of the LED lamp 1 radiated to the outside is impaired due to the shielding action of the LED lamp 1, the mixing ratio is preferably in the range of 5 to 20%.
【００１３】ここで、拡散剤６の添加で蛍光剤４の劣化
が防止できる理由について考察してみると、例えば上記
の実施形態においては、蛍光剤４と拡散剤６との混入さ
れている比率は、蛍光剤４が０．７％であり、拡散剤６
が１３％であるので、略１：２０である。Here, the reason why the deterioration of the fluorescent agent 4 can be prevented by adding the diffusing agent 6 will be discussed. For example, in the above embodiment, the mixing ratio of the fluorescent agent 4 and the diffusing agent 6 is considered. Means that the fluorescent agent 4 is 0.7% and the diffusing agent 6
Is 13%, which is approximately 1:20.
【００１４】このことは、例えばＬＥＤチップ３からの
光が樹脂ケース５内に入射した場合、両者が同じ粒径で
あると仮定すると、光は２０倍の確率で拡散剤６に当接
し、そして拡散光として反射されるものとなる。従っ
て、蛍光剤４に達する光は拡散剤６が添加されない場合
の１／２０の直射光と、より光度の低い拡散光となり、
これにより蛍光剤４の劣化の進行が低減されると考えら
れる。This means that, for example, when light from the LED chip 3 enters the resin case 5, assuming that both have the same particle size, the light comes into contact with the diffusing agent 6 with a probability of 20 times, and It will be reflected as diffused light. Therefore, the light that reaches the fluorescent agent 4 becomes a direct light of 1/20 of the case where the diffusing agent 6 is not added, and diffused light having a lower luminous intensity.
It is considered that the progress of deterioration of the fluorescent agent 4 is thereby reduced.
【００１５】尚、本発明を成すために行った試作などに
おける具体的な条件について記載すれば、前記ＬＥＤチ
ップ３は発光波長が４３０nmの青色発光のものであり、
前記蛍光剤４はＦＭ―１６（シンロイヒ株）であり、樹
脂ケース５は酸無水物系エポキシ樹脂であり、拡散剤６
はＳＯ―Ｃ５（株アドマテックス）である。Incidentally, the specific conditions in a trial production and the like performed to realize the present invention will be described. The LED chip 3 emits blue light having an emission wavelength of 430 nm.
The fluorescent agent 4 is FM-16 (Singleich Co.), the resin case 5 is an acid anhydride epoxy resin, and the diffusing agent 6
Is SO-C5 (Admatex Co., Ltd.).
【００１６】[0016]
【発明の効果】以上に説明したように本発明により、樹
脂ケースには５〜２０ｗｔ％の拡散剤が蛍光剤と共に混
入されている蛍光剤入りＬＥＤランプとしたことで、従
来は比較的に短時間の使用で蛍光剤の劣化による光度低
下、発光色のシフトなどを生じ使用不可能となっていた
蛍光剤入りＬＥＤランプに対し、蛍光剤の劣化を低減さ
せ、格段に長時間の使用を可能とするものであり、これ
により、この種の蛍光剤入りＬＥＤランプの性能向上に
極めて優れた効果を奏するものである。As described above, according to the present invention, a resin-containing LED lamp in which 5 to 20% by weight of a diffusing agent is mixed with a fluorescent agent in a resin case is used. Deterioration of fluorescent agent due to deterioration of fluorescent agent due to deterioration of fluorescent agent due to the use of time, shift of emission color, etc. Thereby, an extremely excellent effect is achieved in improving the performance of this kind of LED lamp containing a fluorescent agent.
【図１】 本発明に係る蛍光剤入りＬＥＤランプの実施
形態を模式的に示す説明図である。FIG. 1 is an explanatory view schematically showing an embodiment of an LED lamp containing a fluorescent agent according to the present invention.
【図２】 同じく本発明に係る蛍光剤入りＬＥＤランプ
の光度減衰特性を従来例との比較で示すグラフである。FIG. 2 is a graph showing the luminous intensity attenuation characteristics of the phosphor-containing LED lamp according to the present invention in comparison with a conventional example.
【図３】 同じく本発明に係る蛍光剤入りＬＥＤランプ
の拡散剤の混入比と光度減衰率との関係を示すグラフで
ある。FIG. 3 is a graph showing the relationship between the mixing ratio of a diffusing agent and the luminous decay rate of the LED lamp containing a fluorescent agent according to the present invention.
【図４】 従来例を模式的に示す説明図である。FIG. 4 is an explanatory view schematically showing a conventional example.
１……蛍光剤入りＬＥＤランプ ２……リードフレーム ３……ＬＥＤチップ ４……蛍光剤 ５……樹脂ケース ６……拡散剤 Ｄ……光度維持率曲線 DESCRIPTION OF SYMBOLS 1 ... LED lamp containing a fluorescent agent 2 ... Lead frame 3 ... LED chip 4 ... Fluorescent agent 5 ... Resin case 6 ... Diffusing agent D ... Light intensity maintenance rate curve
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−99345（ＪＰ，Ａ) 特開 平５−152609（ＪＰ，Ａ) 特開 昭62−252181（ＪＰ，Ａ) 特開 昭49−122292（ＪＰ，Ａ) 実開 昭62−184584（ＪＰ，Ｕ) 実開 昭55−112870（ＪＰ，Ｕ) 実開 昭54−22486（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01L 33/00 H01L 23/29 H01L 23/31 ＪＩＣＳＴファイル（ＪＯＩＳ)──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-7-99345 (JP, A) JP-A-5-152609 (JP, A) JP-A-62-252181 (JP, A) JP-A-49-49 122292 (JP, A) Japanese Utility Model Showa 62-184584 (JP, U) Japanese Utility Model Showa 55-112870 (JP, U) Japanese Utility Model Showa 54-22486 (JP, U) (58) Field surveyed (Int. 7 , DB name) H01L 33/00 H01L 23/29 H01L 23/31 JICST file (JOIS)
Claims (1)
混入して成る蛍光剤入りＬＥＤランプにおいて、前記樹
脂ケースには５〜２０ｗｔ％の拡散剤が前記蛍光剤と共
に混入されていることを特徴とする蛍光剤入りＬＥＤラ
ンプ。1. A fluorescent agent-containing LED lamp in which a fluorescent agent is mixed into at least a part of a resin case, wherein 5 to 20 wt% of a diffusing agent is mixed into the resin case together with the fluorescent agent. LED lamp containing a fluorescent agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8326996A JP3065544B2 (en) | 1996-12-06 | 1996-12-06 | LED lamp with fluorescent agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8326996A JP3065544B2 (en) | 1996-12-06 | 1996-12-06 | LED lamp with fluorescent agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10173240A JPH10173240A (en) | 1998-06-26 |
| JP3065544B2 true JP3065544B2 (en) | 2000-07-17 |
Family
ID=18194152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8326996A Expired - Lifetime JP3065544B2 (en) | 1996-12-06 | 1996-12-06 | LED lamp with fluorescent agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3065544B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002050797A (en) | 2000-07-31 | 2002-02-15 | Toshiba Corp | Semiconductor excitation phosphor light-emitting device and manufacturing method therefor |
| JP3609709B2 (en) * | 2000-09-29 | 2005-01-12 | 株式会社シチズン電子 | Light emitting diode |
| JP2003101078A (en) * | 2001-09-25 | 2003-04-04 | Toyoda Gosei Co Ltd | Light-emitting device |
| JP2003152227A (en) * | 2001-11-14 | 2003-05-23 | Citizen Electronics Co Ltd | Means and method for correcting color of led |
| JP3983793B2 (en) | 2004-04-19 | 2007-09-26 | 松下電器産業株式会社 | Manufacturing method of LED illumination light source and LED illumination light source |
| US7132805B2 (en) * | 2004-08-09 | 2006-11-07 | Dialight Corporation | Intelligent drive circuit for a light emitting diode (LED) light engine |
| JP2007053170A (en) * | 2005-08-16 | 2007-03-01 | Toshiba Corp | Light emitting device |
| JP2007227590A (en) * | 2006-02-23 | 2007-09-06 | Nichia Chem Ind Ltd | Light emitting device |
| US7731377B2 (en) * | 2006-03-21 | 2010-06-08 | Semiconductor Energy Laboratory Co., Ltd. | Backlight device and display device |
| US7910938B2 (en) | 2006-09-01 | 2011-03-22 | Cree, Inc. | Encapsulant profile for light emitting diodes |
-
1996
- 1996-12-06 JP JP8326996A patent/JP3065544B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10173240A (en) | 1998-06-26 |
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