JPS63191886A - Phosphor - Google Patents
PhosphorInfo
- Publication number
- JPS63191886A JPS63191886A JP2411387A JP2411387A JPS63191886A JP S63191886 A JPS63191886 A JP S63191886A JP 2411387 A JP2411387 A JP 2411387A JP 2411387 A JP2411387 A JP 2411387A JP S63191886 A JPS63191886 A JP S63191886A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- peak height
- formula
- luminescence peak
- gd2o3
- 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
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 43
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052693 Europium Inorganic materials 0.000 claims abstract description 13
- FNWBQFMGIFLWII-UHFFFAOYSA-N strontium aluminate Chemical class [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Sr+2].[Sr+2] FNWBQFMGIFLWII-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910001938 gadolinium oxide Inorganic materials 0.000 claims description 11
- 229940075613 gadolinium oxide Drugs 0.000 claims description 11
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 10
- 239000005084 Strontium aluminate Substances 0.000 claims description 7
- 238000004020 luminiscence type Methods 0.000 abstract description 10
- 239000006104 solid solution Substances 0.000 abstract description 5
- 238000004090 dissolution Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 229910001940 europium oxide Inorganic materials 0.000 description 5
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 4
- 239000004327 boric acid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 150000004820 halides Chemical class 0.000 description 4
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 4
- 229910000018 strontium carbonate Inorganic materials 0.000 description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 3
- 150000002823 nitrates Chemical class 0.000 description 3
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- TYIZUJNEZNBXRS-UHFFFAOYSA-K trifluorogadolinium Chemical compound F[Gd](F)F TYIZUJNEZNBXRS-UHFFFAOYSA-K 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 101001034831 Homo sapiens Interferon-induced transmembrane protein 5 Proteins 0.000 description 1
- 102100039731 Interferon-induced transmembrane protein 5 Human genes 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- OYFJQPXVCSSHAI-QFPUQLAESA-N enalapril maleate Chemical compound OC(=O)\C=C/C(O)=O.C([C@@H](C(=O)OCC)N[C@@H](C)C(=O)N1[C@@H](CCC1)C(O)=O)CC1=CC=CC=C1 OYFJQPXVCSSHAI-QFPUQLAESA-N 0.000 description 1
- -1 europium-activated strontium aluminate Chemical class 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Luminescent Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は２価のユーロピウムで付活されたストロンチウ
ム・アルミネート蛍光体に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a strontium aluminate phosphor activated with divalent europium.
従来の技術
従来、２価のユーロピウムで付活されたストロンチウム
・アルミネート蛍光体としては、米国特許第３２９４６
９９号明細書、および、ジイーブラーゼ（Ｇ、ＢＬＡＳ
ＳＥ ）およびニー プリル（Ａ、ＢＲＩＬ）、フィリ
ップス リサーチ レポート（Ｐｈｉｌｉｐｓ Ｒｅ５
ｅａｒｃｈ Ｒｅｐｏｒｔｓ）第２３巻第２０１頁に研
究報告があり、５ｒＡｅ ２０４：Ｅｕ”＋および５ｒ
Ａｅ １２０＋９：Ｅｕ”＋の発光ピーク波長はそれぞ
れ５２０ｎ■および３９５ｔｖであることが知られてい
る。近年、高演色形蛍光ランプの効率改善に関して、４
８０〜５００ｎ−に発光ピークを有する蛍光体が注目さ
れている。最近の研究によれば、例えば、シイ−ティー
シー ファン ケメナダ（Ｊ、Ｔ、Ｃ，ＶＡＮ ＫＥ
ＭＥＮＡＤＥ ）およびシイ−ビー エフ フークス（
Ｇ、Ｐ、Ｆ、ＨＯＥＫＳ ） 、エクステンプイツト
アブストラクト（Ｅｘｔｅｎｄｅｄ ａｂｓｔｒａｃｔ
）講演番号６０７．イー シー ニス スプリング ミ
イーティング（Ｅ、Ｃ，Ｓ、Ｓｐｒｉｎｇ Ｆ４ｅｅｔ
ｉｎｇ） １９８３年に報告されている５ｒ４Ａｅ １
４０２５： Ｅｕ”＋蛍光体は発光ピーク波長が４９Ｏ
ｎ−にある新しいタイプのアルミネートである。Prior Art Conventionally, a strontium aluminate phosphor activated with divalent europium is disclosed in U.S. Pat. No. 32946.
No. 99 specification, and Dieblase (G, BLAS)
SE) and nee Pril (A, BRIL), Philips Research Report (Philips Re5
There is a research report in Volume 23, page 201 of 5rAe 204:Eu”+ and 5r
It is known that the emission peak wavelengths of Ae 120+9:Eu"+ are 520n and 395tv, respectively.Recently, regarding the efficiency improvement of high color rendering fluorescent lamps, 4
Phosphors having an emission peak at 80 to 500 n- are attracting attention. According to recent research, for example, C.V.A.N.
MENADE) and CB Fuchs (
G, P, F, HOEKS), Extempuits
Abstract (Extended abstract)
) Lecture number 607. E, C, S, Spring F4eet
ing) 5r4Ae 1 reported in 1983
4025: Eu”+ phosphor has an emission peak wavelength of 49O
This is a new type of aluminate in n-.
発明が解決しようとする問題点
しかしながら、この２価のユーロピウムで付活された青
緑色蛍光体は発光ピーク高さが不充分であり、その向上
が望まれていた。Problems to be Solved by the Invention However, this blue-green phosphor activated with divalent europium has an insufficient emission peak height, and it has been desired to improve it.
本発明は、このような事情にもとづいてなされたもので
、発光ピーク高さを向上させた２価のユーロピウム付活
ストロンチウム・アルミネート蛍光体を提供することを
目的とするものである。The present invention was made based on the above circumstances, and an object of the present invention is to provide a divalent europium-activated strontium aluminate phosphor with improved emission peak height.
問題点を解決するための手段
本発明の蛍光体は、２価のユーロピウムで付活されたス
トロンチウム・アルミネートに酸化ガドリニウムを固溶
させてなる。Means for Solving the Problems The phosphor of the present invention is made by dissolving gadolinium oxide in strontium aluminate activated with divalent europium.
作用
かかる構成により、２価のユーロピウム付活ストロンチ
ウム・アルミネート蛍光体の明るさを向上することがで
きる。Effect: With this configuration, the brightness of the divalent europium-activated strontium aluminate phosphor can be improved.
実施例
発明者らは、２価のユーロピウムで付活されたストロン
チウム・アルミネート蛍光体について詳細な実験を行っ
た結果、この蛍光体にさらに酸化ガドリニウムを固溶さ
せることによ′って、その発光ピーク高さを一層向上さ
せ得ることを見出した。すなわち、発明者らの実験によ
れば、２価のユーロピウムで付活されたストロンチウム
・アルミネート蛍光体は、その組成式が
４（Ｓｒ、Ｅｕ）Ｏ・ｘ Ａｅ ２０３・ｙ ＧｄｘＯ
ｓで表わされるものであり、上記組成式のｘ、ｙの範囲
がそれぞれ６≦Ｘ≦８．Ｏ＜ｙ≦０．１の場合に、より
好ましい発光ピーク高さの向上が得られたものである。Example As a result of detailed experiments on a strontium aluminate phosphor activated with divalent europium, the inventors found that by further dissolving gadolinium oxide in this phosphor, the strontium aluminate phosphor was activated. It has been found that the height of the luminescence peak can be further improved. That is, according to the inventors' experiments, the strontium aluminate phosphor activated with divalent europium has a composition formula of 4(Sr, Eu)O.x Ae 203.y GdxO.
s, and the ranges of x and y in the above compositional formula are 6≦X≦8. In the case of O<y≦0.1, a more preferable improvement in the emission peak height was obtained.
さらに言えば、本発明にかかる蛍光体の場合、そのＡｅ
２０３量Ｘが６＞ｘまたは８＜ｘの領域においても酸
化ガドリニウムの固溶により発光ピーク高さが向上する
という効果は明らかに認められたが、これらの向上され
たピーク高さをもってしても現在実用されている５ｒ４
Ａｅ １４０２５： Ｅｕ２＋蛍光体の発光ピーク高す
ヲ越えるものは得られず、実用的なレベルには至らない
ことを確認した。また、付活剤であるユーロピウム添加
量は他の一般に使用されている蛍光体におけるユーロピ
ウム濃度の範囲で上記酸化ガドリニウム固溶による発光
ピーク高さの向上効果が認められた。Furthermore, in the case of the phosphor according to the present invention, its Ae
The effect of improving the luminescence peak height due to the solid solution of gadolinium oxide was clearly observed even in the region where the amount 5r4 currently in use
Ae 14025: It was confirmed that the emission peak height of Eu2+ phosphor could not be exceeded, and that it did not reach a practical level. Moreover, the effect of improving the luminescence peak height due to the solid solution of gadolinium oxide was observed within the range of the europium concentration in other commonly used phosphors.
本発明にかかる蛍光体は以下に述べる製造方法によって
得られる。まず、蛍光体原料としては、（１） 酸化
ガドリニウム（ＧｄｘＯｓ）または硝酸塩、炭酸塩ハロ
ゲン化物等の高温で容易にＧｄ２Ｏ３に変化し得る化合
物。The phosphor according to the present invention can be obtained by the manufacturing method described below. First, the raw materials for the phosphor include (1) compounds that can be easily converted to Gd2O3 at high temperatures, such as gadolinium oxide (GdxOs), nitrates, carbonates, and halides;
■ 酸化バリウム（ＳｒＯ）または硝酸塩、炭酸塩、ハ
ロゲン化物等の高温で容易にＳｒＯに変化し得る化合物
。■ Barium oxide (SrO) or compounds that can be easily converted to SrO at high temperatures, such as nitrates, carbonates, and halides.
（３）酸化アルミニウム（Ａｅ２０３）または硝酸塩、
水酸化物、ハロゲン化物等の高温で容易にＡｅ２０３に
変化し得る化合物。(3) aluminum oxide (Ae203) or nitrate,
Compounds that can be easily converted to Ae203 at high temperatures, such as hydroxides and halides.
（４） 酸化ユーロピウム（ＥＬＩ２０３）または硝
酸塩、炭酸塩、ハロゲン化物等の高温で容易にＥｕ２ｏ
３に変化し得る化合物。(4) Europium oxide (ELI203) or nitrates, carbonates, halides, etc. can be easily converted to Eu2o at high temperatures.
Compounds that can change into 3.
が用いられる。上記原料を秤量し、ホウ酸、無水ホウ酸
などを適量添加して、ボールミルにより充分に粉砕混合
する。これを石英ボートに充填し、還元雰囲気中におい
て１１００〜１６００℃の範囲内の温度で数時間焼成す
ることによって所望の蛍光体を得る。is used. The above raw materials are weighed, an appropriate amount of boric acid, boric anhydride, etc. is added, and the mixture is thoroughly ground and mixed using a ball mill. The desired phosphor is obtained by filling this into a quartz boat and firing it at a temperature within the range of 1100 to 1600° C. for several hours in a reducing atmosphere.
以下、本発明の実施例について述べる。Examples of the present invention will be described below.
実施例１
酸化ガドリニウム ０．１８ｇ炭酸ストロンチ
ウム ５７．２７ｇ酸化アルミニウム ７１
．４０ｇ酸化ユーロピウム ２．１１ｇ無水ホ
ウ酸 １．７４ ｇ上記原料をボールミ
ルにて充分に粉砕混合し、還元雰囲気中、１１００〜１
６００℃の温度で数時間焼成し蛍光体を得た。得られた
蛍光体の組成式は次のとおりである。Example 1 Gadolinium oxide 0.18g Strontium carbonate 57.27g Aluminum oxide 71
．． 40g europium oxide 2.11g boric anhydride 1.74g The above raw materials were thoroughly ground and mixed in a ball mill, and in a reducing atmosphere,
A phosphor was obtained by firing at a temperature of 600° C. for several hours. The composition formula of the obtained phosphor is as follows.
４（Ｓｒｏ、５７Ｅｕｏ、ｏ３）０・７Ａｅ２０３・ｏ
、００５Ｇｄ２０３この蛍光体の紫外線励起による発光
ピーク高さは酸化ガドリニウムを含まない従来の蛍光体
４（Ｓｒｏ、９ｒＥｕｏ、ｏｚ）０４Ａｅ２０３の発光
ピーク高さに比べて１１０％であり、明らかに大幅な向
上が認められた。4 (Sro, 57Euo, o3) 0.7Ae203.o
, 005Gd203 The emission peak height of this phosphor upon ultraviolet excitation is 110% compared to that of the conventional phosphor 4 (Sro, 9rEuo, oz) 04Ae203 that does not contain gadolinium oxide, which is clearly a significant improvement. was recognized.
実施例２
フッ化ガドリニウム ０．１１ｇ炭酸ストロンチ
ウム ５７．８６ｇ酸化アルミニウム ７１
．４０ｇ酸化ユーロピウム １．４０ｇホウ酸
２．６８ｇ
上記原料を用い、実施例１と同様にして蛍光体を得た。Example 2 Gadolinium fluoride 0.11g Strontium carbonate 57.86g Aluminum oxide 71
．． 40g europium oxide 1.40g boric acid 2.68g Using the above raw materials, a phosphor was obtained in the same manner as in Example 1.
得られた蛍光体の組成式は次のとおりである。The composition formula of the obtained phosphor is as follows.
４（Ｓ ｒｏ、ｓｓ Ｅｕｏ、ｏ２）０４ Ａ ｅ ２
０ｓ・０．００２５ Ｇｄ２Ｏ３この蛍光体の紫外線励
起による発光ピーク高さは、酸化ガドリニウムを含まな
い従来の蛍光体４（Ｓｒｏ、５ｅＥｕｏ、ｏｘ）０４Ａ
ｇ ２０３の発光ピーク高さに比べて１０７％であり、
明らかな向上が認められた。4 (S ro, ss Euo, o2) 04 A e 2
0s・0.0025 Gd2O3 The height of the emission peak due to ultraviolet excitation of this phosphor is higher than that of conventional phosphor 4 (Sro, 5eEuo, ox) 04A that does not contain gadolinium oxide.
It is 107% compared to the luminescence peak height of g 203,
A clear improvement was observed.
実施例３
フッ化ガドリニウム ４．２８ｇ炭酸ストロンチ
ウム ５７．２７ｇ酸化アルミニウム ８１
．６０ｇ酸化ユーロピウム ２．１１ｇホウ酸
１．３４ｇ
上記原料を用い、実施例１と同様にして蛍光体を得た。Example 3 Gadolinium fluoride 4.28g Strontium carbonate 57.27g Aluminum oxide 81
．． 60g europium oxide 2.11g boric acid 1.34g Using the above raw materials, a phosphor was obtained in the same manner as in Example 1.
得られた蛍光体の組成式は次のとおりである。The composition formula of the obtained phosphor is as follows.
４（Ｓ ｒｏ、５７Ｅｕｏ、ｏｓ）０・８ Ａ ｅ ２
０ｓ・０．ｌ Ｇｄ２Ｏ３この蛍光体の紫外線励起によ
る発光ピーク高さは酸化ガドリニウムを含まない従来の
蛍光体４（Ｓｒｏ、５７Ｅｕｏ、ｏｓ）Ｏ°８Ａｅ２０
３（７）発光ピーク高さに比べて１０５％であり、明ら
かな向上が認められた。4 (S ro, 57 Euo, os) 0.8 A e 2
0s・0. l Gd2O3 The height of the emission peak of this phosphor upon excitation with ultraviolet light is 0°8 Ae20
3(7), which was 105% compared to the emission peak height, and a clear improvement was observed.
実施例４
酸化ガドリニウム １．０９ｇ炭酸ストロンチ
ウム ５７．８５ｇ酸化アルミニウム ６１
．２０ｇ酸化ユーロピウム ０．７０ ｇホウ
酸 ２．６８ｇ上記原料を用い、実
施例１と同様にして蛍光体を得た。得られた蛍光体の組
成式は次のとおりである。Example 4 Gadolinium oxide 1.09g Strontium carbonate 57.85g Aluminum oxide 61
．． 20g europium oxide 0.70g boric acid 2.68g A phosphor was obtained in the same manner as in Example 1 using the above raw materials. The composition formula of the obtained phosphor is as follows.
４（Ｓｒｏ、５ｓＥｕｏ、ｏ＋）０・６Ａｅｔｏ３・０
．０３Ｇｄ２ｏｚこの蛍光体の紫外線励起による発光ピ
ーク高さは酸化ガドリニウムを含まない従来の蛍光体４
（Ｓｒｏ、５ｓＥｕｏ、ｏ＋）０・６Ａｅ２０３の発光
ピーク高さに比べて１１３％であり、明らかな向上が認
められた。4 (Sro, 5sEuo, o+) 0.6Aeto3.0
．． 03Gd2ozThe height of the emission peak due to ultraviolet excitation of this phosphor is higher than that of a conventional phosphor that does not contain gadolinium oxide4.
(Sro, 5sEuo, o+) It was 113% compared to the emission peak height of 0.6Ae203, and a clear improvement was observed.
上記実施例においてフラックスとして用いているホウ素
含有化合物は得られた蛍光体中に、例えば４（Ｓｒ、Ｅ
ｕ）０・７Ａｅ２０３に対して０．２８２０３量が残っ
ていることが認められたが、本蛍光体の結晶構造に太き
（影響するものではないことをＸ線回折データにより確
認した。また発光特性に関しても、と（に悪い影響はな
（、必要であれば水洗等の後処理によりある程度は除去
することもできるものである。The boron-containing compound used as a flux in the above examples is contained in the obtained phosphor, for example, 4 (Sr, E
u) It was observed that an amount of 0.28203 remained relative to 0.7Ae203, but it was confirmed by X-ray diffraction data that this did not affect the crystal structure of this phosphor. As for the properties, there is no negative effect on (, and if necessary, it can be removed to some extent by post-treatment such as washing with water.
発明の詳細
な説明したように、本発明は２価のユーロピウム付活ス
トロンチウム・アルミネートに酸化ガドリニウムを固溶
させることによって、発光ピーク高さを向上することの
できるすぐれた蛍光体を提供することができるものであ
る。As described in detail, the present invention provides an excellent phosphor that can improve the height of the luminescence peak by dissolving gadolinium oxide in divalent europium-activated strontium aluminate. It is something that can be done.
Claims (1)
ルミネートに酸化ガドリニウムを固溶させてなることを
特徴とする蛍光体。A phosphor characterized by having gadolinium oxide dissolved in strontium aluminate activated with divalent europium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2411387A JPS63191886A (en) | 1987-02-04 | 1987-02-04 | Phosphor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2411387A JPS63191886A (en) | 1987-02-04 | 1987-02-04 | Phosphor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63191886A true JPS63191886A (en) | 1988-08-09 |
Family
ID=12129274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2411387A Pending JPS63191886A (en) | 1987-02-04 | 1987-02-04 | Phosphor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63191886A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5376303A (en) * | 1994-06-10 | 1994-12-27 | Nichia Chemical Industries, Ltd. | Long Decay phoaphors |
| JPH0711250A (en) * | 1993-04-28 | 1995-01-13 | Nemoto Tokushu Kagaku Kk | Light-storing fluorescent material |
| US5686022A (en) * | 1994-11-01 | 1997-11-11 | Nemoto & Co., Ltd. | Phosphorescent phosphor |
| JP2004140367A (en) * | 2002-10-16 | 2004-05-13 | Samsung Electronics Co Ltd | Power supply device capable of protecting circuit for electronic equipment |
-
1987
- 1987-02-04 JP JP2411387A patent/JPS63191886A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0711250A (en) * | 1993-04-28 | 1995-01-13 | Nemoto Tokushu Kagaku Kk | Light-storing fluorescent material |
| EP0622440B2 (en) † | 1993-04-28 | 2002-12-18 | Nemoto & Co., Ltd. | Phosphorescent phosphor |
| US5376303A (en) * | 1994-06-10 | 1994-12-27 | Nichia Chemical Industries, Ltd. | Long Decay phoaphors |
| US5686022A (en) * | 1994-11-01 | 1997-11-11 | Nemoto & Co., Ltd. | Phosphorescent phosphor |
| JP2004140367A (en) * | 2002-10-16 | 2004-05-13 | Samsung Electronics Co Ltd | Power supply device capable of protecting circuit for electronic equipment |
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