JP2013163723A - Phosphor and light-emitting device - Google Patents

Phosphor and light-emitting device Download PDF

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JP2013163723A
JP2013163723A JP2012026591A JP2012026591A JP2013163723A JP 2013163723 A JP2013163723 A JP 2013163723A JP 2012026591 A JP2012026591 A JP 2012026591A JP 2012026591 A JP2012026591 A JP 2012026591A JP 2013163723 A JP2013163723 A JP 2013163723A
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phosphor
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Keita Kobayashi
慶太 小林
Fumihiro Nakahara
史博 中原
Koki Ichikawa
恒希 市川
Susumu Mizutani
晋 水谷
Yasuto Fushii
康人 伏井
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Denki Kagaku Kogyo Kk
電気化学工業株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/16Gas discharge lamps, e.g. fluorescent lamps, high intensity discharge lamps [HID] or molecular radiators
    • Y02B20/18Low pressure and fluorescent lamps
    • Y02B20/181Fluorescent powders

Abstract

PROBLEM TO BE SOLVED: To provide: a phosphor that has high luminance, and that has a high temperature characteristic and long-term reliability; and a white light-emitting device using the phosphor.SOLUTION: A phosphor includes: an oxynitride phosphor (A) in which the peak wavelength is 535 to 540 nm and the fluorescent intensity is 240 to 260%; and a nitride phosphor (B) in which the peak wavelength is 625 to 635 nm. The mix proportion of the phosphor (A) is 74 to 89 pts.mass, and the mix proportion of the phosphor (B) is 11 to 19 pts.mass.

Description

本発明は、LED(Light Emitting Diode)に用いられる蛍光体及びLEDを用いた発光装置に関する。 The present invention relates to a light emitting device using the phosphor and LED used in LED (Light Emitting Diode).

白色発光装置に用いられる蛍光体として、β型サイアロンと赤色発光蛍光体の組み合わせがあり(特許文献1参照)、特定の色座標を有する赤色発光蛍光体と緑色発光蛍光体を組み合わせた蛍光体がある(特許文献2参照)。 As the phosphor used in the white light emitting device, there is a combination of β-SiAlON and the red-emitting phosphor (see Patent Document 1), phosphor which is a combination of red-emitting phosphor and green-emitting phosphor having a specific color coordinates there (see Patent Document 2).

特開2007−180483号公報 JP 2007-180483 JP 特開2008−166825号公報 JP 2008-166825 JP

本発明の目的は、特定の窒化物蛍光体に酸窒化物蛍光体を加えて高輝度と高演色性を両立させた蛍光体を提供することにあり、この蛍光体を用いた白色発光装置を提供することにある。 An object of the present invention is to provide a phosphor having both high brightness and high color rendering properties by adding an oxynitride phosphor particular nitride phosphor, a white light emitting device using the phosphor It is to provide.

本発明は、ピーク波長545nm以上550nm以下、蛍光強度240%以上260%以下の酸窒化物蛍光体(A)と、ピーク波長625nm以上635nm以下の窒化物蛍光体(B)を有し、蛍光体(A)の配合比が74質量部以上89質量部以下であり、蛍光体(B)の配合比が11質量部以上19質量部以下である蛍光体である。 The present invention has a peak wavelength of 545nm or more 550nm or less, a fluorescence intensity 240% exceeding 260% or less of the oxynitride phosphor and (A), more than the peak wavelength 625 nm 635 nm or less of the nitride phosphor (B), phosphor or less 89 parts by mass ratio 74 parts by weight or more (a), a phosphor blend ratio is less 19 parts by mass or more 11 parts by weight of the phosphor (B).

蛍光体の配合比は、蛍光体(A)及び(B)の配合比をa及びbとした際に、a+b≧88質量部、4.0≦a/b≦8.0の関係を有することが好ましい。 The compounding ratio of phosphors, phosphor compounding ratio of (A) and (B) upon the a and b, a + b ≧ 88 parts by mass, to have a relation of 4.0 ≦ a / b ≦ 8.0 It is preferred.

蛍光体(A)がβ型サイアロン、蛍光体(B)がSCASNを主相とするのが好ましい。 Phosphor (A) is β-sialon phosphor (B) is preferably a main phase of SCASN.

本願の他の観点からの発明は、前述の蛍光体と、当該蛍光体を発光面に搭載したLEDとを有する発光装置である。 Invention from another aspect of the present application, a light emitting device comprising a phosphor described above, the LED equipped with the phosphor on the light emitting surface.

本発明によれば、高輝度・高演色性で高温特性と長期信頼性を有する蛍光体及びこの蛍光体を用いた白色発光装置を提供することができる。 According to the present invention, it is possible to provide a white light emitting device using the phosphor and the phosphor having high temperature characteristics and long-term reliability at high luminance and high color rendering.

本発明は、ピーク波長545nm以上550nm以下、蛍光強度240%以上260%以下の酸窒化物蛍光体(A)と、ピーク波長625nm以上635nm以下の窒化物蛍光体(B)を有する蛍光体である。 The present invention has a peak wavelength of 545nm or more 550nm or less, is phosphor having fluorescence intensity 240% exceeding 260% or less of the oxynitride phosphor and (A), more than the peak wavelength 625 nm 635 nm or less of the nitride phosphor (B) .

この2種の蛍光体を混在させることにより、高輝度・高演色性で優れた高温特性と長期信頼性を有する蛍光体を得ることができた。 By mixing these two phosphors, it was possible to obtain a phosphor having excellent high-temperature characteristics and long-term reliability at high luminance and high color rendering.

蛍光体(A)の配合比は74質量部以上89質量部以下であり、蛍光体(B)の配合比は11質量部以上19質量部以下である。 Mixing ratio of phosphor (A) is not more than 89 parts by mass or more 74 parts by weight, the compounding ratio of phosphors (B) is less than 19 parts by mass 11 parts by mass or more. 蛍光体(A)の配合比は、あまりに少ないと輝度が低くなる傾向にあり、あまりに多いと高い演色性を得難くなる傾向にあるため、かかる範囲が好ましく、蛍光体(B)の配合比も、あまりに少ないと高い演色性を示さず、甚だしい場合には白色光そのものが得られなくなり、あまりに多いと輝度が低下し、更には白色光が得られなくなる場合がある。 Mixing ratio of phosphor (A) is in too small a tendency that the luminance is low, because of the too much when high color rendering the obtained easily, such a range is preferable, the compounding ratio of phosphors (B) not show too little when high color rendering white light itself can not be obtained in the extreme case, and the luminance decreases and too much, even in some cases white light can not be obtained.

蛍光体の蛍光強度は、標準試料(YAG、具体的には三菱化学株式会社製P46Y3)のピーク高さを100%とした相対値を%表示したものである。 The fluorescence intensity of the phosphor, the standard samples (YAG, specifically Mitsubishi Chemical Corp. P46Y3) is obtained by displaying a relative value taken as 100% the peak height%. 蛍光強度の測定機は、株式会社日立ハイテック社製F−7000形分光光度計を用い、測定方法は、次のものである。 Measuring the fluorescence intensity, using a Hitachi Hi-Tech Co., Ltd. F-7000 form spectrophotometer, measurement methods are the following.
<測定法> <Measurement Method>
1)試料セット:石英製セルに測定試料及び標準試料を充填し、十分にエイジングした測定機に交互にセットして測定する。 1) Sample Set: a quartz cell filled with the sample and the standard sample are measured and set alternately sufficiently aging the measuring instrument. 充填は、相対充填密度35%程度になるようにしてセル高さの3/4程度まで充填した。 Filling was filled to about 3/4 of the cell height set to be a relative packing density of about 35%.
2)測定:455nmの光で励起し、400nmから700nmの最大ピークの高さを読み取った。 2) Measurement: excited with light of 455 nm, reading the height of the maximum peak of 700nm from 400 nm. 測定を5回行ない、最大、最小値を除いて残りの3点の平均値とした。 Measuring conducted 5 times, and the average of the remaining three points excluding the maximum and minimum values.

本発明における蛍光体(A)は、ピーク波長545nm以上550nm以下、蛍光強度240%以上260%以下の緑色発光酸窒化物蛍光体である。 Phosphor (A) in the present invention, the peak wavelength of 545nm or more 550nm or less, a green light-emitting oxynitride fluorescent material below 260% fluorescent intensity 240% or more. 具体的には、β型サイアロンがあり、より具体的には、電気化学工業株式会社アロンブライト(登録商標)の内、GR−LW545E、GR−LW545F、GR−LW545G、GR−LW548E、GR−LW548FF、GR−LW548Gがある。 More specifically, there is a β-sialon, and more specifically, out of Denki Kagaku Kogyo Co., Ltd. Aaron Bright (registered trademark), GR-LW545E, GR-LW545F, GR-LW545G, GR-LW548E, GR-LW548FF , there is a GR-LW548G. これらは、ピーク波長が比較的長波長で、高いピーク強度を有することを両立させた従来にない蛍光体である。 These are the peak wavelength is relatively long wavelength, a fluorophore unprecedented having both have a high peak intensity. βサイアロン蛍光体では、ピーク波長がこの波長域にあると、通常の緑色蛍光体に比べて視感度が高いため明るくなる一方、色再現性の低下は比較的小さい。 The β-sialon phosphor, the peak wavelength is in the wavelength region, whereas the brighter due to high visibility as compared with conventional green phosphor, a reduction in color reproducibility is relatively small.

本発明における蛍光体(B)は、ピーク波長625nm以上635nm以下の窒化物蛍光体である。 Phosphor (B) in the present invention is a nitride phosphor of the following peak wavelength 625nm or 635 nm. 具体的には、SCASNと略されてエスカズンとよばれる赤色蛍光体であり、より具体的には、三菱化学株式会社BR−102CやBR−102F、Intenatix社のR6436(ピーク波長630nm)がある。 Specifically, a red phosphor called Esukazun been abbreviated SCASN, more specifically, Mitsubishi Chemical Corporation BR-102C and BR-102F, there is R6436 (peak wavelength 630 nm) of Intenatix company. また、これら赤色蛍光体の添加量を超えない範囲で、ピーク波長の調整用としてIntematix社R6535(ピーク波長640nm)や三菱化学株式会社のBR−102D(ピーク波長620nm)やBR−101A(ピーク波長650nm)を混在させても良い。 Further, within a range that does not exceed the amount of the red phosphor, BR-102D (peak wavelength 620 nm) and BR-101A (peak wavelength of Intematix Corporation R6535 (peak wavelength 640 nm) and Mitsubishi Chemical Corporation for the adjustment of the peak wavelength 650nm) may be mixed.

高輝度かつ高信頼性を維持するために、蛍光体(A)及び蛍光体(B)の配合量は多い方がよく、それぞれの配合比をa、bとしたとき、88質量部≦a+bが好ましい。 To maintain a high luminance and high reliability, the amount of phosphor (A) and the phosphor (B) is, the more often, when the respective compounding ratios a, is b, 88 parts by weight ≦ a + b preferable.

蛍光体(B)は蛍光体(A)に比べて視感度が低く、明るさに劣るため、その配合比は、低い方が好ましいが、あまりに低いと演色性までもが低下し、甚だしい場合にはLEDが白色光を示さなくなるため、4.0≦a/b≦8.0の範囲が好ましい。 Phosphor (B) has a lower luminosity than the phosphor (A), is inferior to the brightness, the compounding ratio is preferably low, even drops to too low color rendering property, in the worst case since the LED showed no white light, a range of 4.0 ≦ a / b ≦ 8.0 is preferred.

蛍光体(A)と(B)、更には他の蛍光体との混合手段は、均一に混合又は希望する混合度合いに混合できれば、適宜選択できるものである。 Phosphor (A) and (B), even the mixing means with other phosphors, if mixed homogeneously mixing or degree of mixing desired, in which can be appropriately selected. この混合手段にあっては、不純物が混入したり、蛍光体の形状や粒度が明らかに変わったりしないことが前提である。 In the this mixing means, or contaminated with impurities, it is assumed that not changed or reveal the shape and particle size of the phosphor.

本願の他の観点からの発明は、上述の蛍光体と、当該蛍光体を発光面に搭載したLEDとを有する発光装置である。 Invention from another aspect of the present application, a light emitting device comprising a phosphor described above, the LED equipped with the phosphor on the light emitting surface. LEDの発光面に搭載される際の蛍光体は、封止部材によって封止されたものである。 Phosphor when mounted on the light emitting surface of the LED is one sealed by the sealing member. 封止部材としては、樹脂とガラスがあり、樹脂としてはシリコーン樹脂がある。 The sealing member has a resin and glass, as the resin is a silicone resin. LEDとしては、最終的に発光される色に合わせて赤色発光LED、青色発光LED、他の色を発光するLEDを適宜選択することが好ましく、青色発光LEDの場合、窒化ガリウム系半導体で形成され、ピーク波長は440nm以上460nm以下にあるものが好ましく、さらに好ましくピーク波長は、445nm以上455nm以下である。 The LED, the red light-emitting LED in accordance with the color that is finally emitting blue light LED, it is preferable to appropriately select the LED emitting other color, when the blue light emitting LED, is formed in a gallium nitride-based semiconductor , the peak wavelength is preferably intended to be 440nm or 460nm or less, more preferably the peak wavelength is less than 445 nm 455 nm. LEDの発光部の大きさは0.5mm角以上のものが好ましく、LEDチップの大きさは、かかる発光部の面積を有するものであれば適宜選択でき、好ましくは、1.0mm×0.5mm、更に好ましくは1.2mm×0.6mmである。 The size of the LED light-emitting portion is preferably more than 0.5mm square, the size of the LED chip can be appropriately selected as long as it has an area of ​​a light emitting portion, preferably, 1.0 mm × 0.5mm , more preferably from 1.2 mm × 0.6 mm.

本発明に係る実施例を、表及び比較例を用いて詳細に説明する。 The embodiment according to the present invention will be described in detail with reference to tables and comparative examples.


表1に示した蛍光体は、本発明の蛍光体における蛍光体(A)及び(B)とその比較例の蛍光体である。 Phosphors shown in Table 1 is a phosphor in the phosphor of the present invention and (A) and (B) phosphor of the comparative example. 表1の蛍光体(A)のうち、P4だけが請求項1記載の範囲内のピーク波長及び蛍光強度を有する蛍光体である。 Of the phosphor in Table 1 (A), a phosphor only P4 has a peak wavelength and the emission intensity within the range of claim 1, wherein. 表1の蛍光体(B)のうち、P6のみが請求項1記載の範囲内のピーク波長及び蛍光強度を有する蛍光体である。 Of the phosphor in Table 1 (B), a phosphor only P6 has a peak wavelength and the emission intensity within the range of claim 1, wherein.

これら蛍光体を表2の割合で混合して、実施例、比較例に係る蛍光体を得た。 These phosphors are mixed in a ratio of Table 2, Example, to obtain a phosphor according to the comparative example.

実施例1の蛍光体は、蛍光体(A)としての表1のP4の蛍光体を74質量%、蛍光体(B)としての表1のP6の蛍光体を10質量%、P7の蛍光体を3質量%及びそれ以外の蛍光体として(A)の比較例である表1のP2の蛍光体を13質量%配合したものである。 Phosphor of Example 1, 74 wt% of the phosphor in Table 1 P4 as phosphor (A), phosphor P6 of Table 1 10% by mass of the phosphor (B), P7 phosphor the is a 3% by weight and phosphor otherwise the P2 phosphor in Table 1 is a comparative example (a) obtained by blending 13 wt%. 表1での蛍光体の構成におけるP1乃至P7の値は質量%である。 The value of P1 to P7 in the structure of the phosphor in Table 1 is mass%. 蛍光体同士の混合にあっては、合計2.5gを計量してビニール袋内で混合した上、シリコーン樹脂(東レダウコーニング株式会社OE6656)47.5gと一緒に自転公転式の混合機(株式会社シンキー社株式会社あわとり練太郎ARE−310(登録商標))で混合した。 In the mixing of the fluorescent bodies, the total on which 2.5g weighed to the mixed in a plastic bag, a silicone resin (Dow Corning Toray Co., Ltd. OE6656) 47.5g and rotation revolution type mixer together (stock were mixed in a company THINKY Co., Ltd. Awatori Rentaro ARE-310 (registered trademark)). 表1のa+b及びa/bは、蛍光体(A)の実施例であるP4の配合比をa、蛍光体(B)実施例であるP6の配合比をbとしたときの値である。 Table 1 of a + b and a / b is a value when a compounding ratio of P4 is an example of a phosphor (A), the phosphor (B) blending ratio of P6 is an embodiment was b. 但し、bは、P6の配合量を超えない場合には、P5及びP7を含む。 However, b, if not exceeding the amount of P6 include P5 and P7.

LEDへの搭載は、凹型のパッケージ本体の底部にLEDを置いて、基板上の電極とワイヤボンディングした後、混合した蛍光体をマイクロシリンジから注入して行なった。 Mounted to the LED, place the LED in the bottom of the concave of the package body, after the electrodes and the wire bonding on the substrate was performed by injecting mixed phosphor from a microsyringe. 搭載後、120℃で硬化させた後、110℃×10時間のポストキュアを施して封止した。 After mounting, after curing at 120 ° C., sealed by performing post-cure of 110 ° C. × 10 hours. LEDは、発光ピーク波長448nmで、チップ1.0mm×0.5mmの大きさのものを用いた。 LED is a light emission peak wavelength of 448 nm, was used as the size of the chip 1.0 mm × 0.5 mm.

表2で示した評価について説明する。 Evaluation will be described as shown in Table 2.
表2の初期評価として、演色性の評価を採用した。 As an initial evaluation of Table 2, was employed to evaluate the color rendering properties. 演色性の評価には色再現範囲を採用し、色座標におけるNTSC規格比の面積(%)で表した。 The evaluation of the color rendering properties employing the color reproduction range, represented by the area of ​​the NTSC standard ratio in the color coordinate (%). 数字が大きいほど演色性が高い。 The higher the number is high color rendering properties. 評価の合格条件は68%以上であり、70%以上は優れた色再現性、66%未満は色再現性に劣ると言える。 Pass condition evaluation is at 68% or more, 70% or more excellent color reproducibility, less than 66% can be said to poor color reproducibility. これは一般的なLEDモニター向けに採用されている条件である。 This is a condition which is adopted in a general LED monitor for.

表2の輝度は25℃での光束で評価した。 Luminance in Table 2 were evaluated by the light beam at 25 ° C.. 電流60mAを10分間印加した後の測定値を取った。 The current 60mA measurements were taken after application of 10 minutes. 評価の合格条件は、26.6lm以上である。 Pass conditions of assessment is greater than or equal to 26.6lm. この値は測定機や条件によって変わるため、実施例との相対的な比較するために、(実施例の下限値)×90%として設定した値である。 Therefore value vary with measuring and conditions, in order to relative comparison of Example is a value set as the (lower limit of Example) × 90%.

表2の高温特性は、25℃の光束に対する減衰性で評価した。 High temperature properties of Table 2 were evaluated by attenuation for the light flux 25 ° C.. 50℃、100℃、150℃での光束を測定して、25℃を100%とした時の値である。 50 ° C., 100 ° C., by measuring the light beam at 0.99 ° C., a value when the 25 ° C. and 100%. 評価の合格条件は、50℃で97%以上、100℃で95%以上、150℃で90%以上である。 Pass condition evaluation, 50 ° C. at 97% or more, 100 ° C. at 95%, 90% or more at 0.99 ° C.. この値も世界共通の規格値ではないが、現状、高信頼性の発光素子の目安と考えられている。 This value is not in the world-wide standard values, but is considered a measure of current, high reliability of the light-emitting element.

表2の長期信頼性は、85℃、85%RHに500及び2,000hrs放置後取り出して室温で乾燥した際の光束を測定し、初期値を100%としたときの光束の減衰値である。 Long-term reliability of Table 2 is a 85 ° C., and removed after 500 and 2,000hrs left RH 85% to measure the light flux when dried at room temperature, the attenuation value of the light beam when the initial value of 100% .
評価の合格条件は、500hrsで96%以上、2,000hrsで93%以上である。 Pass conditions of evaluation, 96% more than 500hrs, is 93% more than in 2,000hrs. これは高信頼性の蛍光体でなくては達成できない値である。 This is a value that can not be achieved without a phosphor reliable.

表2が示すように、本発明の実施例は、比較的良好な色再現性、光束値を示し、高温や高温高湿下で長期保存した際の光束の減衰も比較的小さい。 As Table 2 shows, embodiments of the present invention, relatively good color reproducibility, shows the luminous flux values, relatively less attenuation of the light beam upon prolonged storage at temperature and humidity and high temperature and high.
本発明の比較例1、4、6及び7は、色再現性に劣り、同じく比較例2、7及び8では光束値が小さい。 Comparative Examples 1, 4, 6 and 7 of the present invention is inferior in color reproducibility, is less well luminous flux value in Comparative Example 2, 7 and 8. また、蛍光体(A)に本発明の範囲外のシリケート系蛍光体を用いた比較例1、3、5、7及び9では、高温特性、長期信頼性に劣り、信頼性の低いLEDパッケージとなって、テレビやモニターなどの製品に適用することは到底望めない。 In Comparative Example 1, 3, 5, 7 and 9 using the range of the silicate-based phosphor of the present invention the phosphor (A), poor high temperature characteristics, long-term reliability, and low reliability LED package it is, be applied to a product such as a television or monitor can not be expected possibly.

本発明の蛍光体は、白色発光装置に用いられる。 Phosphor of the present invention is used in the white light emitting device. 本発明の白色発光装置としては、液晶パネルのバックライト、照明装置、信号装置、画像表示装置に用いられる。 The white light emitting device of the present invention, a backlight of a liquid crystal panel, illumination devices, signaling devices, used for an image display device.

Claims (4)

  1. ピーク波長545nm以上550nm以下、蛍光強度240%以上260%以下の酸窒化物蛍光体(A)と、ピーク波長625nm以上635nm以下の窒化物蛍光体(B)を有し、蛍光体(A)の配合比が74質量部以上89質量部以下であり、蛍光体(B)の配合比が11質量部以上19質量部以下である蛍光体。 Peak wavelength 545nm or 550nm or less, a fluorescence intensity 240% exceeding 260% or less of the oxynitride phosphor and (A), more than the peak wavelength 625 nm 635 nm or less of the nitride phosphor (B), phosphor (A) compounding ratio is less 89 parts by mass 74 parts by mass or more, the phosphor (B) phosphor blend ratio is 19 parts by mass to 11 parts by weight.
  2. 請求項1記載の蛍光体の配合比が、蛍光体(A)及び(B)の配合比をa及びbとした際に、a+b≧88質量部、且つ4.0≦a/b≦8.0の関係を有する蛍光体。 Claim 1 phosphor compounding ratio of the described phosphor compounding ratio of (A) and (B) upon the a and b, a + b ≧ 88 parts by mass, and 4.0 ≦ a / b ≦ 8. phosphor having a relationship of 0.
  3. 蛍光体(A)がβ型サイアロン、蛍光体(B)がSCASNである請求項1又は2のいずれか一項に記載の蛍光体。 The phosphor according to the phosphor (A) is β-sialon, any one of claims 1 or 2 is a phosphor (B) is SCASN.
  4. 請求項1乃至3のいずれか一項に記載の蛍光体と、当該蛍光体を発光面に搭載したLEDとを有する発光装置。 A phosphor according to any one of claims 1 to 3, the light emitting device having an LED equipped with the phosphor on the light emitting surface.
JP2012026591A 2012-02-09 2012-02-09 Phosphor and light-emitting device Pending JP2013163723A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006049799A (en) * 2004-04-27 2006-02-16 Matsushita Electric Ind Co Ltd Light emitting device
JP2008138156A (en) * 2006-02-02 2008-06-19 Mitsubishi Chemicals Corp Complex oxynitride phosphor, light-emitting device, image display device, illuminating device and phosphor-containing composition using the same, and complex oxynitride
WO2009093427A1 (en) * 2008-01-21 2009-07-30 Nichia Corporation Light emitting device
JP2009212508A (en) * 2008-02-07 2009-09-17 Mitsubishi Chemicals Corp Semiconductor light emitting device, backlighting device, and color image display
WO2011099800A2 (en) * 2010-02-12 2011-08-18 삼성엘이디 주식회사 Fluorescent substance, light emitting device, surface light source device, display device and illuminating device
WO2011105157A1 (en) * 2010-02-26 2011-09-01 シャープ株式会社 Light-emitting device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006049799A (en) * 2004-04-27 2006-02-16 Matsushita Electric Ind Co Ltd Light emitting device
JP2008138156A (en) * 2006-02-02 2008-06-19 Mitsubishi Chemicals Corp Complex oxynitride phosphor, light-emitting device, image display device, illuminating device and phosphor-containing composition using the same, and complex oxynitride
WO2009093427A1 (en) * 2008-01-21 2009-07-30 Nichia Corporation Light emitting device
JP2009212508A (en) * 2008-02-07 2009-09-17 Mitsubishi Chemicals Corp Semiconductor light emitting device, backlighting device, and color image display
WO2011099800A2 (en) * 2010-02-12 2011-08-18 삼성엘이디 주식회사 Fluorescent substance, light emitting device, surface light source device, display device and illuminating device
WO2011105157A1 (en) * 2010-02-26 2011-09-01 シャープ株式会社 Light-emitting device

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