JPH10163535A - White light emitting element - Google Patents

White light emitting element

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Publication number
JPH10163535A
JPH10163535A JP31629396A JP31629396A JPH10163535A JP H10163535 A JPH10163535 A JP H10163535A JP 31629396 A JP31629396 A JP 31629396A JP 31629396 A JP31629396 A JP 31629396A JP H10163535 A JPH10163535 A JP H10163535A
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Japan
Prior art keywords
phosphor
light emitting
white light
light
emitting diode
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Pending
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JP31629396A
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Japanese (ja)
Inventor
Takashi Hase
尭 長谷
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Kasei Optonix Co Ltd
化成オプトニクス株式会社
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Priority to JP31629396A priority Critical patent/JPH10163535A/en
Publication of JPH10163535A publication Critical patent/JPH10163535A/en
Application status is Pending legal-status Critical

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/20Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805Shape
    • H01L2224/4809Loop shape
    • H01L2224/48091Arched
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481Disposition
    • H01L2224/48151Connecting 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
    • H01L2224/48221Connecting 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
    • H01L2224/48245Connecting 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
    • H01L2224/48247Connecting 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

Abstract

PROBLEM TO BE SOLVED: To provide a high-brightness and compact white light-emitting element, using a blue or blue-purple light-emitting diode. SOLUTION: A white light-emitting element is a combination of a blue or blue-purple light-emitting diode with at least one type of phosphor which absorbs the light emitted from the light-emitting diode, to emit a light in the visible range. The emitted light colors of the light-emitting diode and phosphor are added to provide a mutually complementary color relation, and the phosphor is selected so that the light-emitting diodes emits a white light, having an emitted chromatic point at a region W in the chromaticity coordinates shown.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、屋内、屋外、さらに水中などにおける表示や、光源またはディスプレイ用バックライトとして利用することができる、高輝度で耐候性及び寿命特性に優れた白色発光素子に関する。 The present invention relates to an indoor, outdoor, further display and the like in water, can be used as a light source or display backlight relates white light emitting device excellent in weather resistance and life characteristics at high intensity .

【0002】 [0002]

【従来の技術】従来、可視発光ダイオードとしては緑色から赤色発光の素子しか実用化されていなかったが、近年、青色発光ダイオードが実用に供され始め、それに伴い、青色、緑色、赤色の各色発光素子を一つの画素として組み合わせたフルカラーの大型ディスプレイが実現している。 Conventionally, although a visible light emitting diodes were not only practical device emitting red light from the green, recently, a blue light-emitting diode begins to be put to practical use, accordingly, blue, green, red colors luminous large display full color combining element as one pixel is realized.

【0003】これに対し、ダイオード単独で白色に発光する白色発光素子を得るためには、青色、緑色、赤色の各色発光素子を同時に発光させ、混色して白色化させることはできるが、小型の白色ディスプレイ、光源又は液晶ディスプレイ等のバックライト等を得るために、前記の各色発光素子を組み合わせると、画素自身が大きくなりすぎ、また、各色の駆動条件が異なると、駆動制御が煩雑になるという欠点があった。 [0003] In contrast, in order to obtain a white light emitting device that emits white light by the diode alone, blue, green, red and the color light-emitting elements were simultaneously emitted, although it is possible to whiten by mixing a small white display, in order to obtain a backlight such as a light source or liquid crystal display, the combination of each color light emitting elements of said, too large the pixel itself, and if the color of the driving conditions are different, that the drive control becomes complicated there is a drawback.

【0004】他方、特開平5ー152609号公報、特開平7ー99345号公報等には、(Ga,Al)N青色発光ダイオードと、蛍光顔料又は蛍光物質を組み合わせた発光素子が記載されているが、発光ダイオードと蛍光物質とを組み合わせ白色発光を得ることについては何も記載はされていない。 [0004] On the other hand, JP-A-5 over 152,609 discloses, in Japanese Patent Laid-7-2 99345 JP etc., are described light emitting device that combines (Ga, Al) and N blue light emitting diodes, fluorescent pigments or fluorescent substances but not mention anything about getting white light combination of a light emitting diode and a fluorescent substance.

【0005】 [0005]

【発明が解決しようとする課題】そこで、本発明では、 The object of the invention is to solve] Therefore, in the present invention,
青色又は青紫色発光ダイオードを用い、高輝度でコンパクトな白色発光素子を提供しようとするものである。 A blue or blue-violet light emitting diode, is intended to provide a compact white light emitting device with high luminance.

【0006】 [0006]

【課題を解決するための手段】本発明者等は、上記目的を達成するために鋭意検討した結果、青色又は青紫色発光の発光ダイオードが高輝度でバンド巾の狭いシャープな青色発光を呈することに着目し、この青色又は青紫色発光で励起され得る蛍光体を調べ、前記ダイオードの発光色と前記蛍光体の発光色を混色するときに、加色混合して白色光を呈する蛍光体を見出し、高輝度でコンパクトな白色発光素子の提供を可能にした。 Means for Solving the Problems The present inventors have carried out an extensive study to achieve the above object, the blue or blue-violet light-emitting diode exhibits a narrow sharp blue emission band width in a high intensity focusing on this checked blue or blue-violet emitting phosphor which can be excited by, when mixing the luminescent color of the phosphor and the emission color of the diode, found by additive color mixing phosphor exhibiting white light was it possible to provide a compact white light emitting device with high luminance.

【0007】即ち、本発明の構成は以下のとおりである。 [0007] In other words, the configuration of the present invention is as follows. (1) 青色又は青紫色の発光ダイオードと、該発光ダイオードの発光を吸収して可視域に発光する1種又は2種類以上の蛍光体とを組み合わせた白色発光素子において、 (1) and a blue or blue-violet light emitting diode, in the white light emitting device that combines the one or more types of phosphors which absorb the light emission of the light emitting diode emits light in the visible region,
前記発光ダイオードと前記蛍光体の発光色が加色して互いに補色の関係になるように、前記蛍光体を選択したことを特徴とする白色発光素子。 Wherein as the emission color of the light emitting diode and the phosphor is complementary colors to each other by additive color, white light emitting device is characterized in that selecting the phosphor.

【0008】(2) 前記発光ダイオードと前記蛍光体の発光色を加色して、図1の色度座標中のWで示した領域内の発光色度点を有する白色に発光するように、前記蛍光体を選択したことを特徴とする上記(1) 記載の白色発光素子。 [0008] (2) the light emitting diode said emission colors of the phosphors additive color and, to emit white having an emission chromaticity point in a region indicated by W in the chromaticity coordinates of FIG. 1, white light emitting element according to (1), wherein a selected said phosphor.

【0009】(3) 前記白色発光素子の発光色の発光色度点(x、y)が、0.21≦x≦0.48、0.19≦ [0009] (3) the emission color of the emission chromaticity point of the white light emitting element (x, y) is, 0.21 ≦ x ≦ 0.48,0.19 ≦
y≦0.45の範囲にあることを特徴とする上記(1) 又は(2) 記載の白色発光素子。 y ≦ above, wherein the in the range of 0.45 (1) or (2) a white light emitting device according.

【0010】(4) 前記蛍光体の励起光として、前記発光ダイオードの400〜500nmの波長の光を用いることを特徴とする上記(1) 〜(3) のいずれか1つに記載の白色発光素子。 [0010] (4) wherein as the excitation light of the phosphor, the white light emitting according to any one of the preceding characterized by using light of a wavelength of 400~500nm light emitting diodes (1) to (3) element.

【0011】(5) 前記蛍光体が(Zn,Cd)S:A [0011] (5) The phosphor (Zn, Cd) S: A
g,Cl蛍光体、(Zn,Cd)S:Ag,Al蛍光体、(Zn,Cd)S:Cu,Al蛍光体、(Zn,C g, Cl phosphor, (Zn, Cd) S: Ag, Al phosphor, (Zn, Cd) S: Cu, Al phosphor, (Zn, C
d)S:Cu,Cl蛍光体,(Zn,Cd)S:Cu, d) S: Cu, Cl phosphor, (Zn, Cd) S: Cu,
Au,Al蛍光体及び(Y,Gd) 3 (Al,Ga) 5 Au, Al phosphor and (Y, Gd) 3 (Al , Ga) 5
12 :Ce,Eu蛍光体の群から選択される少なくとも一種の蛍光体であることを特徴とする上記(1) 〜(4) のいずれか1つに記載の白色発光素子。 O 12: Ce, Eu phosphor at least one white light emitting device according to any one of the preceding characterized in that it is a phosphor (1) to (4) selected from the group of.

【0012】(6) 前記発光ダイオードが(In x ,Al [0012] is (6) the light emitting diode (an In x, Al
y ,Ga 1-xy ) N(但し、x≧0,y≧0,x+y≦ y, Ga 1-xy) N ( where, x ≧ 0, y ≧ 0 , x + y ≦
1)、SiC、BN及びZn(S,Se)の群から選択される少なくとも一種のものであることを特徴とする上記(1) 〜(5) のいづれか1つに記載の白色発光素子。 1), SiC, BN and Zn (S, Se) at least one above and characterized in that it is of (1) to (5) White light emitting device according Izure or in one selected from the group of.

【0013】 [0013]

【発明の実施の形態】本発明は、青色又は青紫色の発光ダイオードと1種又は2種類以上の蛍光体とを組み合わせた白色発光素子であって、発光ダイオードの発光を吸収して可視域に発光する蛍光体を選択し、かつ、発光ダイオードと蛍光体の発光色を加色するときに互いに補色の関係になるような蛍光体を選択することにより、高輝度の白色発光を可能にした。 DETAILED DESCRIPTION OF THE INVENTION The present invention is a white light emitting device that combines a blue or violet light emitting diode and one or more kinds of phosphors, in the visible range by absorbing the light emission of the light emitting diode select the phosphors emitting, and by mutually selecting to become such phosphors related complementary color when additive color light emission color of the light-emitting diode and phosphor, allowed the white light emission with high luminance.

【0014】図2は、本発明の白色発光素子の1例である断面構造を示した模式図である。 [0014] Figure 2 is a schematic diagram showing a sectional structure of an example of a white light emitting device of the present invention. フレーム3の上に青色又は青紫色発光ダイオードチップ4をセットし、その上に蛍光体を塗布し、全体を透明樹脂モールドで被覆し、チップからの電極端子5、6を引き出して素子を形成したものである。 Set the blue or violet light emitting diode chip 4 on the frame 3, a phosphor is applied thereon, and covers the entire transparent resin mold to form an element drawing the electrode terminals 5 and 6 from the chip it is intended.

【0015】本発明で使用する青色又は青紫色発光ダイオードとしては、(In x ,Al y ,Ga 1-xy ) N [0015] As a blue or violet light emitting diodes for use in the present invention, (In x, Al y, Ga 1-xy) N
(但し、x≧0,y≧0,x+y≦1)、SiC、BN (Where, x ≧ 0, y ≧ 0, x + y ≦ 1), SiC, BN
及びZn(S,Se)などを挙げることができ、それらを組み合わせて用いることもできる。 And Zn (S, Se) and the like can be illustrated, may be used in combination. 図3は、GaN発光ダイオードの発光スペクトル図を示したものである。 Figure 3 is a graph showing the emission spectrum of the GaN light emitting diode.
この発光スペクトルの発光ピーク波長は、ほぼ450n Emission peak wavelength of the emission spectrum is approximately 450n
m付近にある。 In the vicinity of m. 本発明の蛍光体は、前記発光ダイオードの発光の一部を用いて励起される。 Phosphor of the present invention is excited by using a part of the emission of the light emitting diode. その結果、発光ダイオードの発光色と励起された蛍光体の発光色が混色する。 As a result, the emission color of the excited phosphor and the emission color of the light-emitting diodes are mixed. 両者が補色の関係にあるときには、混色により白色発光を呈する。 When both are in the complementary color relationship, it emits white light by color mixing.

【0016】本発明で使用する蛍光体は、青色又は青紫色発光ダイオードの発光の一部を励起光として発光する、ほぼ400〜500nmの範囲に励起波長を有する蛍光体であって、発光ダイオードの発光色と蛍光体の発光色が補色の関係にあり、混色により白色を呈するような蛍光体が選択される。 The phosphor used in the present invention, emits a portion of the light emitting blue or blue-violet light emitting diode as the excitation light, a phosphor having an excitation wavelength in the range of approximately 400-500 nm, the light emitting diode emission colors of the phosphor are in complementary colors, the phosphor that emits white is selected by color mixing. 具体的には、発光ダイオードの発光を吸収して自ら青色ないし赤色の可視光に発光する、以下の組成式で表される蛍光体を挙げることがてきる。 Specifically, itself absorbs light emission of the light emitting diode emitting blue light to red visible light, and the like phosphor represented by the following composition formula Tekiru.

【0017】青色発光する(Zn 1-X ,Cd X )S:A The blue light (Zn 1-X, Cd X ) S: A
g,Cl蛍光体(但し0≦x≦0.07)、(Z g, Cl phosphor (where 0 ≦ x ≦ 0.07), (Z
1-X ,Cd X )S:Ag,Al蛍光体(但し0≦x≦ n 1-X, Cd X) S: Ag, Al phosphor (where 0 ≦ x ≦
0.07)等。 0.07), and the like. 緑色発光する(Zn 1-X ,Cd X )S: Emits green light (Zn 1-X, Cd X ) S:
Cu,Al蛍光体(但し、0≦x≦0.15)、(Zn Cu, Al phosphor (where, 0 ≦ x ≦ 0.15), (Zn
1-X ,Cd X )S:Cu,Cl蛍光体(但し、0≦x≦ 1-X, Cd X) S : Cu, Cl phosphor (where, 0 ≦ x ≦
0.20)、(Zn 1-X ,Cd X )S:Ag,Cl蛍光体(但し、0.07≦x≦0.50)、(Zn 1-X ,C 0.20), (Zn 1-X , Cd X) S: Ag, Cl phosphor (where, 0.07 ≦ x ≦ 0.50), (Zn 1-X, C
X )S:Ag,Al蛍光体(但し、0.07≦x≦ d X) S: Ag, Al phosphor (where, 0.07 ≦ x ≦
0.50)、ZnS:Au,Cu,Al蛍光体等。 0.50), ZnS: Au, Cu, Al phosphor and the like.

【0018】黄色発光する(Y 1-u ,Gd u3 (Al [0018] The yellow emission (Y 1-u, Gd u ) 3 (Al
1-v ,Ga v512 :Ce,Eu蛍光体(但し、0≦ 1-v, Ga v) 5 O 12: Ce, Eu phosphor (where, 0 ≦
u≦0.3、0≦v≦0.5)等。 u ≦ 0.3,0 ≦ v ≦ 0.5) or the like. 橙色又は赤色発光する(Zn 1-X ,Cd X )S:Cu,Al蛍光体(但し、 Orange or red emission (Zn 1-X, Cd X ) S: Cu, Al phosphor (where,
0.15≦x≦0.30)、(Zn 1-X ,Cd X )S: 0.15 ≦ x ≦ 0.30), ( Zn 1-X, Cd X) S:
Cu,Cl蛍光体(但し、0.20≦x≦0.30)、 Cu, Cl phosphor (where, 0.20 ≦ x ≦ 0.30),
(Zn 1-X ,Cd X )S:Ag,Cl蛍光体(但し、 (Zn 1-X, Cd X ) S: Ag, Cl phosphor (where,
0.50≦x≦0.90)、(Zn 1-X ,Cd X )S: 0.50 ≦ x ≦ 0.90), ( Zn 1-X, Cd X) S:
Ag,Al蛍光体(但し、0.50≦x≦0.90) Ag, Al phosphor (where, 0.50 ≦ x ≦ 0.90)
等。 etc.

【0019】本発明の蛍光体は、400〜500nmの範囲に励起波長を有し、これらの蛍光体の1種もしくは2種以上の中から、同時に用いる青色又は青紫色発光ダイオードと組み合わせて使用した時、その発光色の発光色度点(x、y)が0.21≦x≦0.48、0.19 The phosphor of the present invention have an excitation wavelength in the range of 400-500 nm, from among one or more of these phosphors were used in combination with blue or violet light emitting diode is used at the same time when, emission chromaticity point of the emission color (x, y) is 0.21 ≦ x ≦ 0.48,0.19
≦y≦0.45の範囲に入り、図1の色度座標中の領域W内に入りほぼ白色の発光を呈するように蛍光体の組み合わせを選択したものである。 ≦ y fall within the scope of ≦ 0.45, is obtained by selecting a combination of the phosphor to exhibit a substantially white light emission falls within the area W in the chromaticity coordinates of FIG.

【0020】なお、発光ダイオードと組み合わせて用いる蛍光体の種類や混合蛍光体の混合比により、上記x、 [0020] Incidentally, the mixing ratio of the phosphor of the kind and mixing phosphor used in combination with the light-emitting diode, the x,
y、u及びvの値が上記範囲を外れると、得られる白色発光素子の色度及び輝度において本発明の特性が得られなくなる。 y, the value of u and v is outside the above range, characteristics of the present invention can not be obtained in the chromaticity and brightness of the resulting white light emitting element.

【0021】本発明の白色発光素子の製造は、予め所定量秤取した蛍光体を、アセトンやトルエン等有機溶剤等に希釈したアクリル樹脂、エポキシ樹脂、ポリイミド樹脂等の透明な樹脂と混合し、例えば、注射器のような細いノズルから発光ダイオードチップ上に数十μg滴下して塗布する。 [0021] Production of white light emitting device of the present invention, by mixing in advance a predetermined amount weighed and phosphor, an acrylic resin diluted in acetone and toluene as organic solvent or the like, an epoxy resin, a transparent resin such as polyimide resin, for example, several tens of μg dropwise to applied to the light emitting diode chip through thin nozzles such as a syringe. また、上記の樹脂の代わりに水溶性樹脂を用いたり、アルカリ珪酸塩を用いても良い。 Also, or a water-soluble resin in place of the above resins may be used an alkali silicate.

【0022】蛍光体を塗布した発光ダイオードチップは乾燥後、エポキシ樹脂等の透明樹脂又はガラス製キャップを発光チップの蛍光体塗布部分に取り付けて白色発光素子を完成する。 The LED chip and the phosphor coated after drying, thereby completing a white light emitting device by attaching the transparent resin or glass cap, such as an epoxy resin in the phosphor coating portion of the light emitting chip. 本発明の発光素子には、最大5V、3 The light-emitting device of the present invention, the maximum 5V, 3
0mAまでの定格直流負荷を加え発光させて白色発光を得ることができる。 Added rated DC loads up to 0mA to emit light white light emission can be obtained by.

【0023】図4〜8は、本発明で使用する蛍光体の主発光を与えるための励起スペクトルを例示したものであり、図4はZnS:Ag,Cl蛍光体、図5はZnS; FIG. 4-8 is an illustration of a excitation spectrum for providing a primary emission of the phosphor to be used in the present invention, Figure 4 is ZnS: Ag, Cl phosphor, 5 ZnS;
Cu,Al蛍光体、図6は(Zn 0.15 ,Cd 0.85 )S: Cu, Al phosphor, 6 (Zn 0.15, Cd 0.85) S :
Ag,Cl蛍光体、図7はY Ag, Cl phosphor, Figure 7 is Y 3 Al 512 :Ce,Eu 3 Al 5 O 12: Ce, Eu
蛍光体、図8は(Y 0.8 ,Gd 0.23 Al 512 :C Phosphor, 8 (Y 0.8, Gd 0.2) 3 Al 5 O 12: C
e蛍光体の励起スペクトルを例示したものである。 It exemplifies the excitation spectrum of the e phosphor.

【0024】図9〜13は、市販のGaN青色発光ダイオードの発光ピークである450nmで、上記各蛍光体を励起した時の発光スペクトルを示したものであり、図9はZnS:Ag,Cl蛍光体、図10はZnS;C FIG. 9-13, at 450nm the emission peak of the commercial GaN blue light-emitting diode, which shows the emission spectrum when excited each of the above phosphor, 9 ZnS: Ag, Cl phosphor body 10 is ZnS; C
u,Al蛍光体、図11は(Zn 0.15 ,Cd 0.85 )S: u, Al phosphor, 11 (Zn 0.15, Cd 0.85) S :
Ag,Cl蛍光体、図12はY 3 Al 512 :Ce,E Ag, Cl phosphor, 12 Y 3 Al 5 O 12: Ce , E
u蛍光体、図13は(Y 0.8 ,Gd 0.23 Al u phosphor, 13 (Y 0.8, Gd 0.2) 3 Al
512 :Ce蛍光体の発光スペクトルを示したものである。 5 O 12: it shows the emission spectrum of the Ce phosphor.

【0025】図14〜16は、GaN青色発光ダイオードと組み合わせた本発明の白色発光素子の発光スペクトルを示したものであり、図14で使用した蛍光体は(Y [0025] 14-16, there is shown an emission spectrum of a white light emitting device of the present invention in combination with GaN blue light-emitting diodes, phosphor used in FIG. 14 (Y
0.8 ,Gd 0.23 Al 512 :Ce、図15で使用した蛍光体はZnS:Ag,Cl及び(Zn 0.15 ,Cd 0.8, Gd 0.2) 3 Al 5 O 12: Ce, phosphor used in Figure 15 is ZnS: Ag, Cl and (Zn 0.15, Cd
0.85 )S:Ag,Cl、図16で使用した蛍光体はY 3 0.85) S: Ag, Cl, phosphors used in FIG. 16 Y 3
Al 512 :Ce,Eu及び(Zn 0.15 ,Cd 0.85 Al 5 O 12: Ce, Eu and (Zn 0.15, Cd 0.85)
S:Ag,Clである。 S: Ag, it is Cl.

【0026】 [0026]

【実施例】 【Example】

〔実施例1〕 エポキシ樹脂(日東電工社製、NT8014) 1gr 酸無水物系硬化剤 1gr 蛍光体(Y 0.8 ,Gd 0.23 Al 512 :Ce 2mg 上記の蛍光体と樹脂との混合液を注射器を用いて、45 Example 1 Epoxy resin (manufactured by Nitto Denko Corporation, NT8014) 1gr acid anhydride curing agent 1gr phosphor (Y 0.8, Gd 0.2) 3 Al 5 O 12: mixed solution of Ce 2 mg The above phosphor and resin via syringe, 45
0nmに発光ピークを有するGaN青色発光ダイオードチップ(0.4mm角)上に50μリットル滴下し、乾燥した後、更に半円形の透明なエポキシ樹脂キャップで被覆して白色発光素子を得た。 It was added dropwise 50μ liter on GaN blue light-emitting diode chip (0.4mm square) having an emission peak at 0 nm, after drying, to obtain a white light emitting element is further coated with a semi-circular transparent epoxy resin cap. この白色発光素子は図1 The white light emitting element 1
4の発光スペクトルを示し、その発光色度W 3はx= 4 shows the emission spectrum, the emission chromaticity W 3 being x =
0.275、y=0.335であった。 0.275, was y = 0.335. なお、上記蛍光体の発光色度はY 1であった。 The emission chromaticity of the phosphor was Y 1.

【0027】〔実施例2〕 アクリル樹脂(日本カーバイト工業製、ニッカゾール、固形分50%) 1gr 脱イオン水 5gr 蛍光体 ZnS:Cu,Al 1mg (Zn 0.15 、Cd 0.85 )S:Ag,Cl 0.5mg 上記の蛍光体と樹脂との混合液を注射器を用いて、45 [0027] Example 2 Acrylic resin (Nippon Carbide Industries Co., Nikkazoru, solids 50%) 1gr deionized water 5gr phosphor ZnS: Cu, Al 1mg (Zn 0.15, Cd 0.85) S: Ag, Cl 0 using a syringe and the mixture of .5mg above phosphor and resin, 45
0nmに発光ピークを有するGaN青色発光ダイオードチップ(0.4mm角)上に50μリットル滴下し、乾燥した後、更に半円形の透明なエポキシ樹脂キャップで被覆して白色発光素子を得た。 It was added dropwise 50μ liter on GaN blue light-emitting diode chip (0.4mm square) having an emission peak at 0 nm, after drying, to obtain a white light emitting element is further coated with a semi-circular transparent epoxy resin cap. この白色発光素子は図1 The white light emitting element 1
5の発光スペクトルを示し、その発光色度W 2はx= 5 shows the emission spectrum, the emission chromaticity W 2 is x =
0.237、y=0.274であった。 0.237, was y = 0.274. なお、上記蛍光体の発光色度はG 2とRであった。 The emission chromaticity of the phosphor was G 2 and R.

【0028】〔実施例3〕 水ガラス(東京応化社製、オーカシールA) 1gr 酢酸バリウム 10gr 蛍光体 Y 3 Al 512 :Ce,Eu 0.001 1mg (Zn 0.15 、Cd 0.85 )S:Ag,Cl 0.5mg 上記の蛍光体と水ガラスの混合液を注射器を用いて、4 [0028] Example 3 water glass (manufactured by Tokyo Ohka Kogyo Co., Ltd., Okashiru A) 1gr barium acetate 10gr phosphor Y 3 Al 5 O 12: Ce , Eu 0.001 1mg (Zn 0.15, Cd 0.85) S: Ag, Cl 0 .5mg above phosphor and a mixture of water glass using a syringe, 4
50nmに発光ピークを有するGaN青色発光ダイオードチップ(4mm角)上に30μリットル滴下し、乾燥した後、更に半円形の透明なエポキシ樹脂キャップで被覆して白色発光素子を得た。 And 30μ liter dropped onto GaN blue light-emitting diode chip (4mm square) having an emission peak at 50 nm, and dried to obtain a white light emitting element is further coated with a semi-circular transparent epoxy resin cap. この白色発光素子は図16 The white light emitting device 16
の発光スペクトルを示し、その発光色度W 1はx=0. Shows the emission spectrum of the emission chromaticity W 1 is x = 0.
223、y=0.253であった。 223, was y = 0.253. なお、上記蛍光体の発光色度はY 2とRであった。 The emission chromaticity of the phosphor was Y 2 and R.

【0029】 [0029]

【発明の効果】本発明は、上記の構成を採用することにより、従来の青色、緑色及び赤色発光ダイオードの組み合わせや、青色及び黄色発光ダイオードの組み合わせでは得られなかった、コンパクトで安価で簡便な白色発光素子を得ることができ、表示の多色化多様化に大きく寄与するものである。 According to the present invention, by adopting the configuration described above, the conventional blue, or a combination of green and red light emitting diodes, could not be obtained by a combination of blue and yellow light emitting diodes, compact and inexpensive and convenient It can be obtained a white light emitting device, thereby contributing greatly to multicolor diversification of display.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の白色発光素子の発光色の範囲Wを色度座標で示した図である。 The range W of the emission color of the white light emitting device of the present invention; FIG illustrates chromaticity coordinates.

【図2】本発明の白色発光素子の構造を例示した概略断面図である。 2 is a schematic cross-sectional view illustrating the structure of a white light emitting device of the present invention.

【図3】本発明の白色発光素子に用いる青色発光ダイオードの1例であるGaNダイオードの発光スペクトルである。 3 is a emission spectrum of the GaN diode is an example of a blue light-emitting diodes used in the white light emitting device of the present invention.

【図4】本発明で用いるZnS:Ag,Cl蛍光体の励起スペクトルである。 [4] used in the present invention ZnS: Ag, the excitation spectra of the Cl phosphor.

【図5】本発明で用いるZnS;Cu,Al蛍光体の励起スペクトルである。 It is Cu, the excitation spectra of the Al phosphor; [5] ZnS used in the present invention.

【図6】本発明で用いる(Zn 0.15 ,Cd 0.85 )S:A [6] used in the present invention (Zn 0.15, Cd 0.85) S : A
g,Cl蛍光体の励起スペクトルである。 g, and excitation spectra of the Cl phosphor.

【図7】本発明で用いるY 3 Al 512 :Ce,Eu蛍光体の励起スペクトルである。 [7] used in the present invention Y 3 Al 5 O 12: Ce , the excitation spectrum of the Eu phosphor.

【図8】本発明で用いる(Y 0.8 ,Gd 0.23 Al 5 [8] used in the present invention (Y 0.8, Gd 0.2) 3 Al 5
12 :Ce蛍光体の励起スペクトルである。 O 12: the excitation spectrum of the Ce phosphor.

【図9】本発明で用いるZnS:Ag,Cl蛍光体を4 [9] used in the present invention ZnS: Ag, Cl phosphor 4
50nmの光で励起するときの発光スペクトルである。 An emission spectrum when excited with light of 50nm.

【図10】本発明で用いるZnS:Cu,Al蛍光体を450nmの光で励起するときの発光スペクトルである。 [10] used in the present invention ZnS: Cu, the emission spectrum when excited Al phosphor with light of 450nm.

【図11】本発明で用いる(Zn 0.15 ,Cd 0.85 )S: [11] used in the present invention (Zn 0.15, Cd 0.85) S :
Ag,Cl蛍光体を450nmの光で励起するときの発光スペクトルである。 Ag, an emission spectrum when excited Cl phosphor with light of 450nm.

【図12】本発明で用いるY 3 Al 512 :Ce,Eu [12] used in the present invention Y 3 Al 5 O 12: Ce , Eu
蛍光体を450nmの光で励起するときの発光スペクトルである。 An emission spectrum when the phosphor is excited with light of 450nm.

【図13】本発明で用いる(Y 0.8 ,Gd 0.23 Al [13] used in the present invention (Y 0.8, Gd 0.2) 3 Al
512 :Ce蛍光体を450nmの光で励起するときの発光スペクトルである。 5 O 12: an emission spectrum when Ce phosphor is excited by light of 450nm.

【図14】実施例において、GaN青色発光ダイオードと(Y 0.8 ,Gd 0.23 Al 512 :Ce蛍光体を組み合わせた白色発光素子の発光スペクトルである。 [14] In an embodiment, GaN blue light-emitting diodes and (Y 0.8, Gd 0.2) 3 Al 5 O 12: an emission spectrum of a white light emitting device that combines Ce phosphor.

【図15】実施例において、GaN青色発光ダイオードと、ZnS:Ag,Cl蛍光体及び(Zn 0.15 ,Cd [15] In an embodiment, a GaN blue light-emitting diode, ZnS: Ag, Cl phosphor and (Zn 0.15, Cd
0.85 )S:Ag,Cl蛍光体とを組み合わせた白色発光素子の発光スペクトルである。 0.85) S: Ag, an emission spectrum of a white light emitting device which combines a Cl phosphor.

【図16】実施例において、GaN青色発光ダイオードと、Y 3 Al 512 :Ce,Eu蛍光体及び(Z In Figure 16 embodiment, a GaN blue light-emitting diodes, Y 3 Al 5 O 12: Ce, Eu phosphor and (Z
0.15 ,Cd 0.85 )S:Ag,Cl蛍光体を組み合わせた白色発光素子の発光スペクトルである。 n 0.15, Cd 0.85) S: Ag, an emission spectrum of a white light emitting device that combines Cl phosphor.

Claims (6)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 青色又は青紫色の発光ダイオードと、該発光ダイオードの発光を吸収して可視域に発光する1種又は2種類以上の蛍光体とを組み合わせた白色発光素子において、前記発光ダイオードと前記蛍光体の発光色が加色して互いに補色の関係になるように、前記蛍光体を選択したことを特徴とする白色発光素子。 And 1. A blue or violet light emitting diode, in the white light emitting device emitting absorbed by the combination of a one or more kinds of phosphors emitting in the visible region of the light emitting diode, a light emitting diode said luminescent color of the phosphor is additive color so that the complementary relationship with each other, a white light emitting element characterized by selecting the phosphor.
  2. 【請求項2】 前記発光ダイオードと前記蛍光体の発光色を加色して、図1の色度座標中のWで示した領域内の発光色度点を有する白色に発光するように、前記蛍光体を選択したことを特徴とする請求項1記載の白色発光素子。 2. A by additive color the emission color of the light emitting diode and the phosphor, to emit white having an emission chromaticity point in a region indicated by W in the chromaticity coordinates of FIG. 1, the white light emitting device according to claim 1, wherein the selected phosphor.
  3. 【請求項3】 前記白色発光素子の発光色の発光色度点(x、y)が0.21≦x≦0.48、0.19≦y≦ 3. A luminescent chromaticity point of the light emitting color of the white light emitting element (x, y) is 0.21 ≦ x ≦ 0.48,0.19 ≦ y ≦
    0.45の範囲にあることを特徴とする請求項1又は2 Claim 1 or 2, characterized in that in the range of 0.45
    記載の白色発光素子。 White light emitting device according.
  4. 【請求項4】 前記蛍光体の励起光として、前記発光ダイオードの400〜500nmの波長の光を用いることを特徴とする請求項1〜3のいずれか1項に記載の白色発光素子。 As excitation light wherein the phosphor, a white light emitting device according to claim 1, which comprises using light having a wavelength of 400~500nm of the light emitting diode.
  5. 【請求項5】 前記蛍光体が(Zn,Cd)S:Ag, Wherein said phosphor is (Zn, Cd) S: Ag,
    Cl蛍光体、(Zn,Cd)S:Ag,Al蛍光体、 Cl phosphor, (Zn, Cd) S: Ag, Al phosphor,
    (Zn,Cd)S:Cu,Al蛍光体、(Zn,Cd) (Zn, Cd) S: Cu, Al phosphor, (Zn, Cd)
    S:Cu,Cl蛍光体,(Zn,Cd)S:Cu,A S: Cu, Cl phosphor, (Zn, Cd) S: Cu, A
    u,Al蛍光体及び(Y,Gd) 3 (Al,Ga) 5 u, Al phosphor and (Y, Gd) 3 (Al , Ga) 5 O
    12 :Ce,Eu蛍光体の群から選択される少なくとも一種の蛍光体であることを特徴とする請求項1〜4のいずれか1項に記載の白色発光素子。 12: Ce, white light-emitting device according to any one of claims 1 to 4, characterized in that at least one phosphor selected from the group of Eu phosphor.
  6. 【請求項6】 前記発光ダイオードが(In x ,A Wherein said light emitting diode (In x, A
    y ,Ga 1-xy ) N(但し、x≧0,y≧0,x+y l y, Ga 1-xy) N ( where, x ≧ 0, y ≧ 0 , x + y
    ≦1)、SiC、BN及びZn(S,Se)の群から選択される少なくとも一種のものであることを特徴とする請求項1〜5のいづれか1項に記載の白色発光素子。 ≦ 1), SiC, BN and Zn (S, Se) white light emitting device according In any one of claims 1 to 5, characterized in that the at least one selected from the group of.
JP31629396A 1996-11-27 1996-11-27 White light emitting element Pending JPH10163535A (en)

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