JPH0927642A - Lighting device - Google Patents
Lighting deviceInfo
- Publication number
- JPH0927642A JPH0927642A JP17730295A JP17730295A JPH0927642A JP H0927642 A JPH0927642 A JP H0927642A JP 17730295 A JP17730295 A JP 17730295A JP 17730295 A JP17730295 A JP 17730295A JP H0927642 A JPH0927642 A JP H0927642A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent
- fluorescent pigment
- cap member
- light
- led chip
- 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.)
- Pending
Links
- 239000000049 pigment Substances 0.000 claims abstract description 62
- 238000005286 illumination Methods 0.000 claims description 16
- 230000006866 deterioration Effects 0.000 abstract description 8
- 230000002093 peripheral effect Effects 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229940058287 salicylic acid derivative anticestodals Drugs 0.000 description 1
- 150000003872 salicylic acid derivatives Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/44—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the coatings, e.g. passivation layer or anti-reflective coating
Landscapes
- Led Devices (AREA)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Led Device Packages (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＬＥＤチップと、
このＬＥＤチップの発光波長を他の波長に変換するため
の蛍光体とを備えた照明装置に関するものである。TECHNICAL FIELD The present invention relates to an LED chip,
The present invention relates to a lighting device provided with a phosphor for converting the emission wavelength of this LED chip into another wavelength.
【０００２】[0002]
【従来の技術】一般に、人間の目の色感度は色調によっ
て違ってくる。例えば、すべての色が混じりあった白色
照明は、光の強さが同じであるという条件下では青単色
照明よりも明るく見える。また、色感度が最も高い色調
は黄緑色であることがわかっている。そこで、青色ＬＥ
Ｄの発光波長を変換して白色発光や緑色発光を行う照明
装置が従来より提案されている。この種の照明装置は、
低波長帯域（紫、青、青緑）の光で蛍光するという蛍光
体の性質を利用したもので、青色ＬＥＤからの光を蛍光
体に当て、この蛍光体の働きによって青色ＬＥＤの発光
波長を白色や緑色の発光波長に変換させて照明を行って
いる。2. Description of the Related Art Generally, the color sensitivity of the human eye differs depending on the color tone. For example, white lighting with a mixture of all colors appears brighter than monochromatic blue lighting, provided the light intensity is the same. It is also known that the color tone with the highest color sensitivity is yellowish green. So blue LE
2. Description of the Related Art An illumination device that converts the emission wavelength of D to emit white light or green light has been conventionally proposed. This kind of lighting device
It utilizes the property of a phosphor that it fluoresces with light in the low wavelength band (purple, blue, blue-green). The light from the blue LED is applied to the phosphor, and the emission wavelength of the blue LED is changed by the function of this phosphor. Lighting is performed by converting the emission wavelength of white or green.
【０００３】このような照明装置の一例を図４を参照し
て具体的に説明する。青色ＬＥＤ１は、リードフレーム
２の先端部に青色ＬＥＤチップ１ａを備え、この青色Ｌ
ＥＤチップ１ａを透明な樹脂１０により封止したもので
ある。青色ＬＥＤ１の上方には蛍光フィルム１１が配置
されている。蛍光フィルム１１には青色発光の波長を白
色発光の波長に変える蛍光顔料１１ａが塗布されてい
る。さらに蛍光フィルム１１の上方には導光体であるイ
ルミプレート１２が配置されている。このイルミプレー
ト１２が照明箇所を構成する。An example of such an illuminating device will be specifically described with reference to FIG. The blue LED 1 includes a blue LED chip 1a at the tip of the lead frame 2, and the blue LED 1a
The ED chip 1a is sealed with a transparent resin 10. A fluorescent film 11 is arranged above the blue LED 1. The fluorescent film 11 is coated with a fluorescent pigment 11 a that changes the wavelength of blue light emission into the wavelength of white light emission. Further, an illumination plate 12 as a light guide is arranged above the fluorescent film 11. The illumination plate 12 constitutes an illumination spot.
【０００４】上記照明装置において、青色ＬＥＤ１を照
明すると、青色ＬＥＤチップ１ａからの光が蛍光フィル
ム１１に当る。このとき、青色ＬＥＤチップ１ａの光の
成分と蛍光顔料１１ａの蛍光成分とが加算され、輝度が
高まって発光色は青色から白色に変わる。この蛍光フィ
ルム１１の発する白色発光を受けて、イルミプレート１
２が白色発光する。In the above lighting device, when the blue LED 1 is illuminated, the light from the blue LED chip 1a strikes the fluorescent film 11. At this time, the light component of the blue LED chip 1a and the fluorescent component of the fluorescent pigment 11a are added, the brightness is increased, and the emission color changes from blue to white. Upon receiving the white light emitted from the fluorescent film 11, the illumination plate 1
2 emits white light.
【０００５】しかし、上記の従来例では、次のような問
題点があった。すなわち、波長変換を行うための蛍光フ
ィルム１１が不可欠であるため、蛍光フィルム１１を置
けない場所を照明することができなかった。つまり、照
明装置を電子機器に組込む場合に、照明装置の設置箇所
に関して、蛍光フィルム１１が配置可能な場所であると
いう制約があった。However, the above-mentioned conventional example has the following problems. That is, since the fluorescent film 11 for performing wavelength conversion is indispensable, it is not possible to illuminate the place where the fluorescent film 11 cannot be placed. That is, when the lighting device is incorporated in an electronic device, there is a restriction that the fluorescent film 11 can be arranged in the installation position of the lighting device.
【０００６】また、イルミプレート１２は導光体である
ため、通常、透明あるいは光が透過し易い部材から成
り、しかも蛍光フィルム１１の真上に位置している。し
たがって、照明していない時や強い外光がイルミプレー
ト１２に照射される時、蛍光フィルム１１の蛍光顔料１
１ａの地色がイルミプレート１２に現れることがある。
その結果、照明装置が組込まれた電子機器のエスカッシ
ョンのデザイン性を損うおそれがあった。Since the illuminator plate 12 is a light guide, it is usually made of a transparent material or a material through which light easily passes, and is located right above the fluorescent film 11. Therefore, the fluorescent pigment 1 of the fluorescent film 11 is not illuminated or when strong external light is applied to the illumination plate 12.
The background color of 1a may appear on the illumination plate 12.
As a result, the escutcheon design of the electronic device in which the lighting device is incorporated may be impaired.
【０００７】このような問題点を解消する従来例とし
て、図５に示すような青色ＬＥＤ１３を用いた照明装置
が提案されている。この照明装置は、蛍光フィルムを青
色ＬＥＤ１３の上方に配置するのでなく、青色ＬＥＤチ
ップ１３ａを封止する樹脂１４内に蛍光顔料１５を混入
させた点を特徴としている。蛍光顔料１５は前記蛍光顔
料１１ａと同様、青色発光の波長を白色発光の波長に変
えるようになっている。As a conventional example for solving such a problem, an illuminating device using a blue LED 13 as shown in FIG. 5 has been proposed. This illuminating device is characterized in that the fluorescent film is not arranged above the blue LED 13, but the fluorescent pigment 15 is mixed in the resin 14 that seals the blue LED chip 13a. Like the fluorescent pigment 11a, the fluorescent pigment 15 changes the wavelength of blue light emission to the wavelength of white light emission.
【０００８】以上の照明装置によれば、蛍光フィルムを
配置することが困難な場所でも、そこに青色ＬＥＤ１３
を取付けるだけで白色照明が可能となる。そのため、照
明装置の設置場所に関する制約がない。また、蛍光フィ
ルムを配置しないので、蛍光顔料の地色がイルミプレー
ト１２から見えない。したがって、照明装置が組込まれ
たエスカッションなどのデザイン性を維持することがで
きる。According to the above lighting device, the blue LED 13 is provided even in a place where it is difficult to dispose the fluorescent film.
White lighting is possible just by mounting. Therefore, there are no restrictions on the installation location of the lighting device. Further, since the fluorescent film is not arranged, the background color of the fluorescent pigment cannot be seen from the illumination plate 12. Therefore, it is possible to maintain the design such as the escutcheon in which the lighting device is incorporated.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、上記の
従来技術には次のような問題点があった。すなわち、蛍
光体から得られる色調を変えることが要望される場合、
蛍光フィルム１１を配置する従来例（図４）にせよ、Ｌ
ＥＤ１３の樹脂に蛍光顔料１５を混入させる従来例（図
５）にせよ、蛍光体を持つ蛍光フィルム１１またはＬＥ
Ｄ１３を、まるごと交換しなくてはならない。このよう
な交換作業は非常に面倒であった。そこで蛍光体の交換
作業の効率を向上させることが望まれていた。However, the above-mentioned prior art has the following problems. That is, if it is desired to change the color tone obtained from the phosphor,
In the conventional example (FIG. 4) in which the fluorescent film 11 is arranged, L
In the conventional example (FIG. 5) in which the fluorescent pigment 15 is mixed with the resin of the ED 13, the fluorescent film 11 or LE having a fluorescent substance is used.
You have to replace the entire D13. Such replacement work was very troublesome. Therefore, it has been desired to improve the efficiency of the phosphor replacement work.
【００１０】また、蛍光体には紫外線に弱いという短所
がある。そのため、蛍光体が紫外線を長時間浴びると、
波長変換率が落ち、色調の劣化や輝度の低下、さらには
寿命特性の短命化といった不具合が生じた。したがっ
て、従来より優れた耐光性が持つ照明装置が待たれてい
る。特に、車載用電子機器に組込まれる照明装置の場
合、車内では強い日光が頻繁に当たるので、極めて高い
耐光性を持つことが要求されている。Further, the phosphor has a drawback that it is weak against ultraviolet rays. Therefore, if the phosphor is exposed to ultraviolet rays for a long time,
The wavelength conversion rate was lowered, and there were problems such as deterioration of color tone and brightness, and shortening of life characteristics. Therefore, an illuminating device having more excellent light resistance than before has been desired. In particular, in the case of an illumination device incorporated in a vehicle-mounted electronic device, strong sunlight is frequently radiated in the vehicle, and therefore it is required to have extremely high light resistance.
【００１１】さらに、蛍光フィルムを用いる場合、ＬＥ
Ｄに近い部分の蛍光フィルムは強い光を発し、ＬＥＤか
ら離れた部分の蛍光フィルムからの光は弱いことにな
る。つまり、光源であるＬＥＤチップから蛍光フィルム
までの距離の相違が大きいため、蛍光フィルムの発光色
にむらが生じ、これがイルミプレートの発光むらを招い
た。Furthermore, when a fluorescent film is used, LE
The fluorescent film in the portion near D emits strong light, and the light from the fluorescent film in the portion away from the LED is weak. That is, since the difference in the distance from the LED chip, which is the light source, to the fluorescent film is large, unevenness in the emission color of the fluorescent film occurs, which causes uneven emission of the illumination plate.
【００１２】本発明は、上記の問題を解決するために提
案されたものであり、第１の目的は、蛍光体の交換作業
を改善して色調変更を容易に実現させる照明装置を提供
することにある。また、本発明の第２の目的は、蛍光体
の耐光性を高めて色調の劣化や輝度の低下を防止し寿命
特性の向上を図ると共に、発光むらのない安定した照明
を行うことが可能な照明装置を提供することにある。The present invention has been proposed to solve the above problems, and a first object of the present invention is to provide an illuminating device for improving the replacement work of the phosphors so that the color tone can be easily changed. It is in. A second object of the present invention is to improve the light resistance of the phosphor to prevent the deterioration of color tone and the deterioration of brightness to improve the life characteristics, and to perform stable illumination without uneven light emission. It is to provide a lighting device.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に、請求項１の発明は、リードフレームの先端部にＬＥ
Ｄチップを設けた照明装置において、リードフレームに
ベース板を取付け、ベース板にＬＥＤチップを覆うよう
にキャップ部材を取付け、このキャップ部材にＬＥＤチ
ップの発光波長を変換するための蛍光顔料を混入したこ
とを特徴とする。In order to achieve the above-mentioned object, the invention according to claim 1 provides LE at the tip of the lead frame.
In a lighting device provided with a D chip, a base plate is attached to a lead frame, a cap member is attached to the base plate so as to cover the LED chip, and a fluorescent pigment for converting the emission wavelength of the LED chip is mixed into the cap member. It is characterized by
【００１４】このような構成を持つ請求項１の発明にお
いては、キャップ部材をベース板から取外すことにより
キャップ部材の交換を容易に行うことができる。そのた
め、蛍光顔料から得られる色調を変更したい場合、キャ
ップ部材の交換に際して、蛍光顔料の種類が異なるキャ
ップ部材に変えることで、これに対応することができ
る。このような請求項１の発明によれば、蛍光顔料から
得られる色調を簡単に変更することができる。According to the first aspect of the invention having such a structure, the cap member can be easily replaced by removing the cap member from the base plate. Therefore, when it is desired to change the color tone obtained from the fluorescent pigment, this can be dealt with by changing the cap member to a cap member having a different type of fluorescent pigment. According to the invention of claim 1, the color tone obtained from the fluorescent pigment can be easily changed.
【００１５】また、請求項２の発明は、前記キャップ部
材の内側に蛍光顔料層を形成し、キャップ部材の外側に
紫外線吸収層を形成したことを構成上の特徴としてい
る。The invention according to claim 2 is characterized in that a fluorescent pigment layer is formed inside the cap member, and an ultraviolet absorbing layer is formed outside the cap member.
【００１６】このような構成を持つ請求項２の発明にお
いては、外光側に形成された紫外線吸収層により蛍光顔
料層を効率良く紫外線から守ることができる。そのた
め、蛍光顔料層の耐光性が高まり、蛍光顔料層が発する
色調の劣化や輝度の低下を防止でき、蛍光顔料層の寿命
特性を延ばすことが可能となる。また、交換が容易であ
るキャップ部材を取換えるときに蛍光顔料の種類を変え
ることにより、蛍光顔料から得られる色調の変更を容易
に実現することができる。According to the second aspect of the invention having such a configuration, the fluorescent pigment layer can be efficiently protected from ultraviolet rays by the ultraviolet absorbing layer formed on the outside light side. Therefore, the light resistance of the fluorescent pigment layer is increased, the deterioration of the color tone and the decrease of the luminance emitted by the fluorescent pigment layer can be prevented, and the life characteristics of the fluorescent pigment layer can be extended. Further, by changing the type of the fluorescent pigment when replacing the cap member, which can be easily replaced, it is possible to easily realize the change of the color tone obtained from the fluorescent pigment.
【００１７】さらに、キャップ部材の内周面に沿って蛍
光顔料層を形成したので、光源であるＬＥＤチップから
蛍光顔料層までの距離をほぼ均等にすることができる。
そのため、蛍光顔料層では発光むらが生じることがな
く、安定した照明を行うことができる。Further, since the fluorescent pigment layer is formed along the inner peripheral surface of the cap member, the distance from the LED chip as the light source to the fluorescent pigment layer can be made substantially equal.
Therefore, uneven illumination does not occur in the fluorescent pigment layer, and stable illumination can be performed.
【００１８】請求項３の発明は、リードフレームの先端
部にＬＥＤチップを設け、このＬＥＤチップの発光波長
を変換するための蛍光フィルムとを備えた照明装置にお
いて、蛍光フィルムはベースフィルムを備え、このベー
スフィルムのＬＥＤチップ側に蛍光顔料層を形成し、前
記ベースフィルムにおいて前記蛍光顔料層を形成した側
と反対側に紫外線吸収層を形成したことを特徴とする。According to a third aspect of the present invention, in a lighting device provided with an LED chip at the tip of a lead frame and a fluorescent film for converting the emission wavelength of this LED chip, the fluorescent film has a base film, A fluorescent pigment layer is formed on the LED chip side of the base film, and an ultraviolet absorbing layer is formed on the side of the base film opposite to the side on which the fluorescent pigment layer is formed.
【００１９】このような構成を持つ請求項３の発明にお
いては、外光側に形成された紫外線吸収層の働きにより
蛍光フィルムを効率良く紫外線から守ることができる。
そのため、蛍光フィルムは優れた耐光性を発揮すること
ができる。したがって、蛍光フィルムが発する色調が劣
化せず、且つ高い輝度を保つことができる。また、蛍光
フィルムの寿命特性も延ばすことができる。In the invention of claim 3 having such a structure, the fluorescent film can be efficiently protected from ultraviolet rays by the function of the ultraviolet absorbing layer formed on the outside light side.
Therefore, the fluorescent film can exhibit excellent light resistance. Therefore, the color tone emitted by the fluorescent film is not deteriorated and high brightness can be maintained. In addition, the life characteristics of the fluorescent film can be extended.
【００２０】[0020]
（１）第１の実施の形態 以下、図１を参照して本発明の第１の実施の形態を説明
する。図１は第１の実施の形態におけるＬＥＤの断面図
である。第１の実施の形態は請求項１を対応している。
なお、以下に説明する発明の実施の形態において、図４
に示した従来例と同一の部材に関しては、同一符号を付
し、説明は省略する。(1) First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a sectional view of an LED according to the first embodiment. The first embodiment corresponds to claim 1.
In the embodiment of the invention described below, FIG.
The same members as those of the conventional example shown in FIG.
【００２１】（構成）リードフレーム２の先端部付近に
はベース板３が取付けられている。ベース板３には青色
ＬＥＤチップ１ａを覆うように樹脂製のキャップ部材４
が嵌込まれて取付けられている。このキャップ部材４に
は、青色発光の波長を白色発光の波長に変える蛍光顔料
５がほぼ均一に分散されて混入されている。(Structure) A base plate 3 is attached near the tip of the lead frame 2. A resin cap member 4 is provided on the base plate 3 so as to cover the blue LED chip 1a.
Is inserted and attached. A fluorescent pigment 5 for changing the wavelength of blue light emission to the wavelength of white light emission is mixed and dispersed in the cap member 4 substantially uniformly.
【００２２】（作用および効果）以上のような構成を有
する第１の実施の形態において、青色ＬＥＤチップ１ａ
からの光が蛍光顔料５に当ると、青色ＬＥＤチップ１ａ
の光の成分と蛍光顔料５の蛍光成分とが加算され、輝度
が高まって発光色は青色から白色に変わり、青色ＬＥＤ
１は白色に発光する。(Operation and Effect) In the first embodiment having the above-mentioned structure, the blue LED chip 1a
When the light from the light strikes the fluorescent pigment 5, the blue LED chip 1a
Light component and the fluorescent component of the fluorescent pigment 5 are added, the brightness is increased, and the emission color changes from blue to white.
1 emits white light.
【００２３】このような第１の実施の形態によれば、次
のような作用効果を獲得することができる。すなわち、
キャップ部材４をベース板３から取外すだけでキャップ
部材４を交換することができる。そのため、蛍光顔料か
ら得られる色調を変更したい場合（例えば、白色発光か
ら緑色発光に変えたい場合）、キャップ部材４の交換を
行い、蛍光顔料５の種類が異なるキャップ部材４に変え
ることにより、これに対応することができる。したがっ
て、第１の実施の形態では蛍光顔料５が発する色調を簡
単に変更することが可能である。According to the first embodiment as described above, the following operational effects can be obtained. That is,
The cap member 4 can be replaced by simply removing the cap member 4 from the base plate 3. Therefore, when it is desired to change the color tone obtained from the fluorescent pigment (for example, to change from white light emission to green light emission), the cap member 4 is replaced and the cap member 4 having a different type of the fluorescent pigment 5 is used. Can correspond to. Therefore, in the first embodiment, it is possible to easily change the color tone emitted by the fluorescent pigment 5.
【００２４】（２）第２の実施の形態 続いて、図２を参照して本発明の第２の実施の形態を説
明する。図２は第２の実施の形態におけるＬＥＤの断面
図である。第２の実施の形態は請求項２を対応してい
る。なお、上記第１の実施の形態と同一の部材に関して
は、同一符号を付し、説明は省略する。(2) Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a sectional view of an LED according to the second embodiment. The second embodiment corresponds to claim 2. The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
【００２５】（構成）ベース板３に取付けられたはキャ
ップ部材４の内側には、キャップ部材４の内周面に沿っ
て蛍光顔料が塗布されて蛍光顔料層６が均一の厚みを持
って形成されている。この蛍光顔料層６は青色発光の波
長を白色発光の波長に変えるようになっている。また、
キャップ部材４の外側にはキャップ部材４の外周面に沿
って紫外線吸収層７が均一の厚みを持って形成されてい
る。(Constitution) Inside the cap member 4 attached to the base plate 3, a fluorescent pigment is applied along the inner peripheral surface of the cap member 4 to form a fluorescent pigment layer 6 having a uniform thickness. Has been done. The fluorescent pigment layer 6 changes the wavelength of blue light emission to the wavelength of white light emission. Also,
An ultraviolet absorbing layer 7 having a uniform thickness is formed outside the cap member 4 along the outer peripheral surface of the cap member 4.
【００２６】前記紫外線吸収層７は紫外線吸収剤が塗布
されて構成されている。紫外線吸収剤とは、可視光を吸
収することなく、光化学的に有害な３００〜４００ｎｍ
の紫外線のみを吸収して大部分を熱エネルギーに変換し
て放散する物質である。現在、実用化されている紫外線
吸収剤としては、サリチル酸誘導体、ベンフェノン系、
ベンゾトリアゾール系などがある。The ultraviolet absorbing layer 7 is formed by coating an ultraviolet absorbent. An ultraviolet absorber is a photochemically harmful 300-400 nm that does not absorb visible light.
Is a substance that absorbs only the ultraviolet rays of and converts most of it into heat energy and dissipates it. Currently, ultraviolet absorbers that have been put into practical use include salicylic acid derivatives, benphenone-based,
Examples include benzotriazole type.
【００２７】（作用および効果）以上のような構成を有
する第２の実施の形態では、青色ＬＥＤチップ１ａから
の光が蛍光顔料層６に当ると、青色ＬＥＤチップ１ａの
光の成分と蛍光顔料層６の蛍光成分とが加算され、輝度
が高まって発光色は青色から白色に変わり、青色ＬＥＤ
１は白色に発光する。(Operation and Effect) In the second embodiment having the above-described structure, when the light from the blue LED chip 1a hits the fluorescent pigment layer 6, the light component of the blue LED chip 1a and the fluorescent pigment. The fluorescent component of layer 6 is added, the brightness is increased, and the emission color changes from blue to white.
1 emits white light.
【００２８】このような第２の実施の形態においては、
紫外線吸収層７を外光側にあるため、この紫外線吸収層
７が蛍光顔料層６を効率良く紫外線から守ることができ
る。したがって、蛍光顔料層６の耐光性を高まめことか
できる。その結果、蛍光顔料層６が発する色調の劣化や
輝度の低下を防ぐことができ、さらには蛍光顔料層６の
寿命特性を延ばすことができる。このような高い耐光性
を持つ照明装置は車載用電子機器に組込まれるものに好
適である。また、キャップ部材４を取換えるときに蛍光
顔料の種類を変えることで、蛍光顔料から得られる色調
の変更を容易に実現することができる。In the second embodiment as described above,
Since the ultraviolet absorbing layer 7 is on the outside light side, the ultraviolet absorbing layer 7 can efficiently protect the fluorescent pigment layer 6 from ultraviolet rays. Therefore, the light resistance of the fluorescent pigment layer 6 can be improved. As a result, it is possible to prevent the deterioration of the color tone and the decrease of the brightness generated by the fluorescent pigment layer 6, and it is possible to extend the life characteristics of the fluorescent pigment layer 6. Such a lighting device having high light resistance is suitable for being incorporated in an on-vehicle electronic device. Further, by changing the type of the fluorescent pigment when replacing the cap member 4, it is possible to easily realize the change of the color tone obtained from the fluorescent pigment.
【００２９】さらに、キャップ部材４の内周面に沿って
蛍光顔料層６を均一の厚みで形成しているため、光源で
ある青色ＬＥＤチップ１ａから蛍光顔料層６までの距離
は、蛍光顔料層６のどの位置でもほぼ均等である。した
がって蛍光顔料層６は発光むらが生じ難く、青色ＬＥＤ
１はむらなく白色発光を行うことができる。その結果、
第２の実施の形態は安定した白色照明を行うことができ
る。Furthermore, since the fluorescent pigment layer 6 is formed with a uniform thickness along the inner peripheral surface of the cap member 4, the distance from the blue LED chip 1a, which is the light source, to the fluorescent pigment layer 6 is the fluorescent pigment layer. It is almost uniform at any position of 6. Therefore, the fluorescent pigment layer 6 is less likely to cause uneven light emission, and the blue LED
1 can emit white light evenly. as a result,
The second embodiment can perform stable white illumination.
【００３０】（３）第３の実施の形態 さらに、図３を参照して本発明の第３の実施の形態を説
明する。図３は第３の実施の形態における蛍光フィルム
の拡大断面図である。第３の実施の形態は請求項３を対
応している。(3) Third Embodiment Further, a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is an enlarged cross-sectional view of the fluorescent film according to the third embodiment. The third embodiment corresponds to claim 3.
【００３１】（構成）第３の実施の形態における基本的
な構成は、先に示した図４の従来例と同様であり、蛍光
フィルムを備えたものであるが、この蛍光フィルムに構
成上の特徴がある。すなわち、図３に示すように、蛍光
フィルム１６にはベースフィルム１６ａが設けられてい
る。(Structure) The basic structure of the third embodiment is the same as that of the conventional example shown in FIG. 4 and has a fluorescent film. There are features. That is, as shown in FIG. 3, the fluorescent film 16 is provided with the base film 16a.
【００３２】このベースフィルム１６ａにおいて青色Ｌ
ＥＤチップ１ａ側（図中上側）には蛍光顔料層８が均一
の厚みを持って形成され、蛍光顔料層８を形成した側と
反対側（図中下側）には紫外線吸収層９が均一の厚みを
持って形成されている。このうち、この蛍光顔料層８は
前記第２の実施の形態の蛍光顔料層６と同様、青色発光
の波長を白色発光の波長に変えるようになっている。ま
た紫外線吸収層９は、前記第２の実施の形態の紫外線吸
収層７と同様、紫外線吸収剤が塗布されて構成されてい
る。In this base film 16a, blue L
The fluorescent pigment layer 8 is formed with a uniform thickness on the ED chip 1a side (upper side in the figure), and the ultraviolet absorbing layer 9 is uniform on the side opposite to the side on which the fluorescent pigment layer 8 is formed (lower side in the figure). Is formed with a thickness of. Among these, the fluorescent pigment layer 8 is adapted to change the wavelength of blue light emission to the wavelength of white light emission, like the fluorescent pigment layer 6 of the second embodiment. Further, the ultraviolet absorbing layer 9 is formed by coating an ultraviolet absorbent as in the ultraviolet absorbing layer 7 of the second embodiment.
【００３３】（作用および効果）このような構成を持つ
第３の実施の形態では、紫外線吸収層９は外光側に形成
されているため、紫外線吸収層９が蛍光フィルム１６を
効率良く紫外線から守ることができる。したがって、蛍
光フィルム１６は耐光性が向上する。これにより、蛍光
フィルム１６が発する色調が劣化することがなく、且つ
高い輝度を保つことができる。また、蛍光フィルム１６
の寿命特性も延ばすことができる。(Operation and Effect) In the third embodiment having such a configuration, the ultraviolet absorbing layer 9 is formed on the outside light side, so that the ultraviolet absorbing layer 9 efficiently protects the fluorescent film 16 from ultraviolet rays. I can protect. Therefore, the light resistance of the fluorescent film 16 is improved. As a result, the color tone emitted by the fluorescent film 16 is not deteriorated and high brightness can be maintained. In addition, the fluorescent film 16
The life characteristics of can also be extended.
【００３４】（４）他の実施の形態 なお、本発明の照明装置は、以上のような実施の形態に
限定されるものではなく、構成部材の材質、形状や寸法
は適宜変更可能であり、例えば、キャップ部材はラバー
製であっても良い。また、蛍光顔料または蛍光フィルム
の種類としては、青色ＬＥＤの発光波長を白色の発光波
長に変換させるものだけではなく、緑色の発光波長に変
換させるであっても良い。(4) Other Embodiments The lighting device of the present invention is not limited to the above embodiments, and the materials, shapes and dimensions of the constituent members can be appropriately changed. For example, the cap member may be made of rubber. Further, as the type of the fluorescent pigment or the fluorescent film, not only the one that converts the emission wavelength of the blue LED into the white emission wavelength but also the one that converts into the green emission wavelength may be used.
【００３５】[0035]
【発明の効果】以上述べたように、本発明の照明装置に
よれば、ベース板に取付けたキャップ部材の交換作業が
容易であるため、キャップ部材に含まれる蛍光顔料の交
換作業を改善することができ、色調変更を容易に実現す
ることができる。また、紫外線吸収層を備えることによ
り耐光性を高めることができ、色調の劣化や輝度の低下
を防止して寿命特性の向上を図ることができる。さら
に、キャップ部材の内周面に沿って蛍光顔料層を形成し
たので、光源であるＬＥＤチップから蛍光顔料層までの
距離をほぼ均等にすることができ、蛍光顔料層に発光む
らが生じることがなく、安定した照明を行うことができ
る。As described above, according to the lighting device of the present invention, the replacement work of the cap member attached to the base plate is easy, so that the replacement work of the fluorescent pigment contained in the cap member is improved. The color tone can be easily changed. Further, by providing the ultraviolet absorbing layer, light resistance can be enhanced, deterioration of color tone and deterioration of brightness can be prevented, and life characteristics can be improved. Further, since the fluorescent pigment layer is formed along the inner peripheral surface of the cap member, the distance from the LED chip, which is the light source, to the fluorescent pigment layer can be made substantially uniform, and uneven light emission may occur in the fluorescent pigment layer. Without, stable lighting can be performed.
【図１】本発明の第１の実施の形態におけるＬＥＤの断
面図。FIG. 1 is a sectional view of an LED according to a first embodiment of the present invention.
【図２】本発明の第２の実施の形態におけるＬＥＤの断
面図。FIG. 2 is a sectional view of an LED according to a second embodiment of the present invention.
【図３】本発明の第３の実施の形態における蛍光フィル
ムの拡大断面図。FIG. 3 is an enlarged cross-sectional view of a fluorescent film according to a third embodiment of the present invention.
【図４】従来の照明装置の断面図。FIG. 4 is a cross-sectional view of a conventional lighting device.
【図５】従来の照明装置におけるＬＥＤの断面図。FIG. 5 is a cross-sectional view of an LED in a conventional lighting device.
１，１３…青色ＬＥＤ １ａ，１３ａ…青色ＬＥＤチップ ２…リードフレーム ３…ベース板 ４…キャップ部材 ５，１１ａ，１５…蛍光顔料 ６，８…蛍光顔料層 ７，９…紫外線吸収層 １１，１６…蛍光フィルム １０，１４…樹脂 １２…イルミプレート 1, 13 ... Blue LED 1a, 13a ... Blue LED chip 2 ... Lead frame 3 ... Base plate 4 ... Cap member 5, 11a, 15 ... Fluorescent pigment 6, 8 ... Fluorescent pigment layer 7, 9 ... Ultraviolet absorbing layer 11, 16 … Fluorescent film 10, 14… Resin 12… Illumination plate
Claims (3)
を設けた照明装置において、 前記リードフレームにベース板を取付け、 前記ベース板に前記ＬＥＤチップを覆うようにキャップ
部材を取付け、 前記キャップ部材に前記ＬＥＤチップの発光波長を変換
するための蛍光顔料を混入したことを特徴とする照明装
置。1. A lighting device in which an LED chip is provided at a tip portion of a lead frame, a base plate is attached to the lead frame, a cap member is attached to the base plate so as to cover the LED chip, and the cap member is provided with the cap member. An illuminating device comprising a fluorescent pigment mixed therein for converting the emission wavelength of an LED chip.
形成し、 前記キャップ部材の外側に紫外線吸収層を形成したこと
を特徴とする請求項１記載の照明装置。2. The lighting device according to claim 1, wherein a fluorescent pigment layer is formed inside the cap member, and an ultraviolet absorbing layer is formed outside the cap member.
を設け、このＬＥＤチップの発光波長を変換するための
蛍光フィルムを備えた照明装置において、 前記蛍光フィルムはベースフィルムを備え、 このベースフィルムのＬＥＤチップ側に蛍光顔料層を形
成し、 前記ベースフィルムにおいて前記蛍光顔料層を形成した
側と反対側に紫外線吸収層を形成したことを特徴とする
照明装置。3. A lighting device comprising an LED chip at the tip of a lead frame and a fluorescent film for converting the emission wavelength of the LED chip, wherein the fluorescent film comprises a base film, and the LED of the base film is used. An illumination device, wherein a fluorescent pigment layer is formed on a chip side, and an ultraviolet absorbing layer is formed on a side of the base film opposite to a side on which the fluorescent pigment layer is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17730295A JPH0927642A (en) | 1995-07-13 | 1995-07-13 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17730295A JPH0927642A (en) | 1995-07-13 | 1995-07-13 | Lighting device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001096578A Division JP2001320091A (en) | 2001-03-29 | 2001-03-29 | Cap member for led and led illuminator provided with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0927642A true JPH0927642A (en) | 1997-01-28 |
Family
ID=16028627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17730295A Pending JPH0927642A (en) | 1995-07-13 | 1995-07-13 | Lighting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0927642A (en) |
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