JPH0410390A - Electroluminescent lamp and method for stabilizing brightness thereof - Google Patents
Electroluminescent lamp and method for stabilizing brightness thereofInfo
- Publication number
- JPH0410390A JPH0410390A JP2111476A JP11147690A JPH0410390A JP H0410390 A JPH0410390 A JP H0410390A JP 2111476 A JP2111476 A JP 2111476A JP 11147690 A JP11147690 A JP 11147690A JP H0410390 A JPH0410390 A JP H0410390A
- Authority
- JP
- Japan
- Prior art keywords
- brightness
- lamp
- required initial
- clamp
- initial brightness
- 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
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 5
- 230000006641 stabilisation Effects 0.000 claims abstract description 20
- 238000011105 stabilization Methods 0.000 claims abstract description 20
- 239000002952 polymeric resin Substances 0.000 claims abstract description 12
- 229920000620 organic polymer Polymers 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 10
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000013065 commercial product Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 238000004078 waterproofing Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910052984 zinc sulfide Inorganic materials 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 125000001731 2-cyanoethyl group Chemical group [H]C([H])(*)C([H])([H])C#N 0.000 description 4
- 239000004373 Pullulan Substances 0.000 description 3
- 229920001218 Pullulan Polymers 0.000 description 3
- 235000019423 pullulan Nutrition 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 229920006284 nylon film Polymers 0.000 description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 2
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 2
- KXJGSNRAQWDDJT-UHFFFAOYSA-N 1-acetyl-5-bromo-2h-indol-3-one Chemical compound BrC1=CC=C2N(C(=O)C)CC(=O)C2=C1 KXJGSNRAQWDDJT-UHFFFAOYSA-N 0.000 description 1
- YDXGXFDEPLKGAQ-UHFFFAOYSA-N 2,3,4-trihydroxybutanenitrile Chemical compound OCC(O)C(O)C#N YDXGXFDEPLKGAQ-UHFFFAOYSA-N 0.000 description 1
- XCKPLVGWGCWOMD-YYEYMFTQSA-N 3-[[(2r,3r,4s,5r,6r)-6-[(2s,3s,4r,5r)-3,4-bis(2-cyanoethoxy)-2,5-bis(2-cyanoethoxymethyl)oxolan-2-yl]oxy-3,4,5-tris(2-cyanoethoxy)oxan-2-yl]methoxy]propanenitrile Chemical compound N#CCCO[C@H]1[C@H](OCCC#N)[C@@H](COCCC#N)O[C@@]1(COCCC#N)O[C@@H]1[C@H](OCCC#N)[C@@H](OCCC#N)[C@H](OCCC#N)[C@@H](COCCC#N)O1 XCKPLVGWGCWOMD-YYEYMFTQSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はエレクトロルミネッセンスランプ（以下、ＥＬ
クランプいう）およびその輝度安定化方法に関するもの
である。Detailed Description of the Invention (Industrial Application Field) The present invention relates to an electroluminescent lamp (hereinafter referred to as EL).
The present invention relates to a method for stabilizing the luminance (clamp) and its luminance stabilization method.
（従来の技術と発明が解決しようとする課題）粉末螢光
体を誘電体中に分散させた層に高電界をかけて発光させ
る分散型ＥＬランプ、中でも誘電体が有機高分子一樹脂
である有機分散型ＥＬランプは、軽量かつ薄型で、自由
な形状が得られる安価な面光源という特長から航空機の
制御盤、自動車のダツシュボード、また液晶デイスプレ
ィ（ＬＣＤ）のバックライト、夜間の安全灯叫のナイト
ライド或は面照明等の用途において実用化が進み、その
需要が増大している。(Prior art and problems to be solved by the invention) A dispersed EL lamp that emits light by applying a high electric field to a layer in which a powder phosphor is dispersed in a dielectric material, in which the dielectric material is an organic polymer-resin. Organic dispersed EL lamps are lightweight, thin, and inexpensive surface light sources that can be shaped into any shape, making them useful for aircraft control panels, automobile dashboards, liquid crystal display (LCD) backlights, and night safety lights. Practical use is progressing in applications such as night riding or surface lighting, and the demand for it is increasing.
しかし、有機分散型ＥＬクランプ輝度の経時変化が大き
く、寿命が比較的短いという難点がある。従ってこれま
てＥＬクランプ輝度劣化を少なくシ、長寿命化を図るた
めの種々の研究や工夫がなされ、またＥＬクランプ駆動
回路についても輝度の低下を小さくするための工夫がな
されてきた。これらの工夫、二改善により上記用途への
ＥＬクランプ実用が進んできた訳であるが、今なお輝度
劣化により寿命が比較的短いということはＥＬクランプ
おける大きな問題点とされている。そしてこれを改善す
るための努力が今も続けられている訳であるが、これ迄
の研究、工夫はＥＬクランプ輝度劣化の軽減自体に集中
し、ＥＬクランプ使い方を工夫することにより実用上輝
度低下を安定化し、結果的に長寿命化を図るという提案
は本願発明者が知る限りこれ迄存在しない。However, there are disadvantages in that the luminance of the organic dispersion type EL clamp changes significantly over time and its lifespan is relatively short. Therefore, various studies and efforts have been made to reduce the deterioration in the brightness of the EL clamp and extend its life, and efforts have also been made to reduce the deterioration in the brightness of the EL clamp drive circuit. Although these ideas and improvements have led to the practical use of EL clamps for the above-mentioned purposes, the relatively short lifespan due to luminance deterioration is still considered to be a major problem in EL clamps. Efforts are still being made to improve this problem, but the research and innovations to date have focused on reducing the EL clamp brightness deterioration itself, and by devising ways to use the EL clamp, it is possible to reduce the brightness in practical use. As far as the inventor of this application is aware, there has been no proposal to stabilize the battery and thereby extend its life.
本発明は従来盲点となっていたＥＬクランプ使い方につ
いて工夫、改善し輝度劣化の実用上の安定化、従って長
寿命化を実現するＥＬクランプ提案するものである。The present invention proposes an EL clamp that improves and improves the usage of the EL clamp, which has been a blind spot in the past, and achieves practical stabilization of brightness deterioration, and therefore, a longer service life.
（課題を解決するための手段）
上記の目的を達成するために、本発明のＥＬクランプ背
面電極層の上に螢光体を有機高子樹脂に分散させた組成
物から成る発光層と透明電極層とを順次積層して形成し
たエレクトロルミネッセンスランプにおいて、該ランプ
の実用前に予め、要求初期輝度よりも高い輝度が得られ
る課電条件にてランプの安定化運転を行うことによりラ
ンプの輝度を低下させ、輝度が要求初期輝度に一致する
ように調整されていることを特徴とするものである。(Means for Solving the Problems) In order to achieve the above object, a light-emitting layer made of a composition in which a phosphor is dispersed in an organic polymer resin and a transparent electrode are provided on the EL clamp back electrode layer of the present invention. In an electroluminescent lamp formed by sequentially laminating layers, the brightness of the lamp can be increased by stabilizing the lamp under electrification conditions that provide a brightness higher than the required initial brightness before putting the lamp into use. This is characterized in that the brightness is adjusted to match the required initial brightness.
また本発明のＥＬクランプ輝度安定化方法は、背面電極
層の上に螢光体を分散させた組成物から成る発光層と透
明電極層とを順次積層して形成したエレクトロルミネッ
センスランプヲ、ソの実用前に予め、要求初期輝度より
も高い輝度が得られる課電条件にて駆動する安定化運転
を行い、これによりランプの輝度を低下させて輝度を要
求初期輝度に一致するように調整することを特徴とする
ものである。Further, the EL clamp brightness stabilization method of the present invention can be applied to an electroluminescent lamp formed by sequentially laminating a light-emitting layer made of a composition in which a phosphor is dispersed on a back electrode layer and a transparent electrode layer. Before putting the lamp into use, perform stabilization operation under energizing conditions that provide a brightness higher than the required initial brightness, thereby lowering the lamp brightness and adjusting the brightness to match the required initial brightness. It is characterized by:
本発明の対象とする有機分散型ＥＬクランプ、一般に、
第１図にその断面図を示すように背面電極層１の上に、
順次、有機高分子一樹脂絶縁層２、螢光体を有機高分子
一樹脂に分散させた組成物から成る発光層３および透明
電極層４を積層して構成され、通常これ等全体を捕水用
フィルム５て覆い、更に全体を防水用外装フィルム６に
よって密封している。有機高分子一樹脂絶縁層２は発光
層の絶縁破壊を防止するために設けたもので、用途酸は
課電条件、使用条件によってはこれを省略することもで
きる。The organic dispersion type EL clamp that is the object of the present invention generally includes:
As shown in the cross-sectional view of FIG. 1, on the back electrode layer 1,
It is constructed by sequentially laminating an organic polymer-resin insulating layer 2, a light-emitting layer 3 made of a composition in which a fluorescent material is dispersed in an organic polymer-resin, and a transparent electrode layer 4, and usually the whole is used to capture water. It is covered with a protective film 5, and the whole is further sealed with a waterproof exterior film 6. The organic polymer-resin insulating layer 2 is provided to prevent dielectric breakdown of the light emitting layer, and may be omitted depending on the application acid and usage conditions.
本発明は基本的にこのような構造を有する有機分散型Ｅ
Ｌクランプ広く通用できるものである。従って上記各層
を構成する材料は従来から使用されてきた材料が使用で
き、絶縁層２および発光層３を構成する有機高分子一樹
脂としては訪電率が大きいシアノエチルセルシーズ、シ
アノグリセロール、シアノエチルプルラン、シアノエチ
ルサッカロース、シアノエチルポリビニルアルコール、
ふつ化ヒニルミふっ化エチレン重合体等が好適に用いら
れる。有機高分子一樹脂絶縁層２はかかる有機高分子一
樹脂単独或は必要に応じてＢａＴｉＯ３等の高誘電率材
料や液化防止材を配合した組成物で構成される。螢光体
はＺｎＳ： Ｃｕ 、 Ｃ１％ＺｎＳ ： Ｃｕ、Ａ６
、ＺｎＳ ： Ｍｎ 、 Ｃｕ等の硫化亜鉛の母材に発
光中心を生成するためのＣｕ、Ｍｎ等の付加剤およびＣ
１１，Ａ１．Ｃｕ等の共付加剤を添加した螢光体が好適
に使用され、発光層３は通常５〜２０ Ｔｏｍの大きさ
のかかる螢光体を上記の有機高分子一樹脂に分散した組
成物から成る。透明電極４はポリエステルフィルム上に
■ｎ２０３．８ｎｏ２等を蒸着したものが通常用いられ
る。捕水用フィルム５としてはナイロンフィルムが、ま
た防水用外装フィルム６としてはＰＣＴＦＥフィルムが
一般に用いられる。The present invention is basically an organic dispersion type E having such a structure.
This L clamp can be widely used. Therefore, the materials constituting each of the above layers can be conventionally used materials, and the organic polymers and resins constituting the insulating layer 2 and the light-emitting layer 3 include cyanoethyl cell seeds, cyanoglycerol, and cyanoethyl pullulan, which have a high contact rate. , cyanoethyl sucrose, cyanoethyl polyvinyl alcohol,
Fluorinated ethylene polymers and the like are preferably used. The organic polymer-resin insulating layer 2 is composed of the organic polymer-resin alone or a composition containing a high dielectric constant material such as BaTiO3 or a liquefaction prevention material as required. The phosphor is ZnS: Cu, C1%ZnS: Cu, A6
, ZnS: Additives such as Cu, Mn, etc. and C to generate luminescent centers in the zinc sulfide base material such as Mn, Cu, etc.
11, A1. A phosphor to which a co-addant such as Cu is added is preferably used, and the light-emitting layer 3 is composed of a composition in which such a phosphor having a size of usually 5 to 20 Tom is dispersed in the above-mentioned organic polymer-resin. . The transparent electrode 4 is usually a polyester film on which a material such as ■n203.8no2 is vapor-deposited. A nylon film is generally used as the water-trapping film 5, and a PCTFE film is generally used as the waterproof exterior film 6.
上記のような構成の有機分散型ＥＬクランプ以下では、
単にＥＬクランプいう）はその背面電極層と透明！極層
との間に課電する課電条件すなわち駆動電圧および周波
数によってその輝度が異なる。一般に駆動電圧が高い方
が輝度が高く、また駆動周波数が高い方が輝度が高い。Below the organic dispersion type EL clamp configured as above,
Simply called EL clamp) is transparent with its back electrode layer! The brightness varies depending on the conditions for applying electricity between the electrode layer, that is, the driving voltage and frequency. Generally, the higher the driving voltage, the higher the brightness, and the higher the driving frequency, the higher the brightness.
従って例えば１３５Ｖ、ｌ ｋＨｚの課電条件て要求初
期輝度例えば２００ Ｃｄ／ｍ２に等しい輝度が得られ
るＥＬクランプ例えば１４５ Ｖ、 １ ｋＨｚの課
電条件で駆動すれば、要求初期輝度より高い輝度例えば
２５０ Ｃｄ７ｍ”が得られる。不発明で言う要求初期
輝度よりも高い輝度が得られる課電条件とは、上記の例
における１４５Ｖ、１ｋＨｚの如き課電条件である。ま
た、ここで言う要求初期輝度とはＥＬクランプ製品につ
きユーザーが要求する或は製品の設計もしくは規格とし
て生産者もしくは販売者が保証する、ＥＬクランプ実用
開始時の輝度を言う。Therefore, if an EL clamp that can obtain a luminance equal to a required initial luminance of, for example, 200 Cd/m2 under a charging condition of, for example, 135 V and 1 kHz, is driven under a charging condition of, for example, 145 V and 1 kHz, a luminance higher than the required initial luminance of, for example, 250 Cd/m2 is obtained. Cd7m'' is obtained.The power application conditions that provide a brightness higher than the required initial brightness in the non-invention are the power application conditions such as 145V and 1kHz in the above example.Also, the required initial brightness and refers to the brightness required by the user of the EL clamp product or guaranteed by the manufacturer or seller as a product design or standard, at the time the EL clamp is put into practical use.
而して上記のような課電条件にてＥＬクランプ駆動する
ことにより要求初期輝度より高い初期輝度、上記の例で
言えば２５０ Ｃｄ７ｍ”の初期輝度が得られるが、Ｅ
Ｌクランプ駆動し続ければ、ＥＬクランプ輝度は時間の
経過と共に急速に低減し、成る時間経過後には要求初期
輝度、上記の例で言えば２００ Ｃｄ７ｍ”となり、本
発明においてはこの段階でＥＬクランプ要求初期輝度に
合致する輝度をもつ製品として実用に供される。本発明
で言う安定化運転とは、上記のように、ＥＬクランプ製
品として実用に供する前に予め、要求初期輝度よりも高
い輝度が得られる課電条件にてＥＬクランプ連続駆動し
、ＥＬクランプ輝度を要求初期輝度に合致する迄低下さ
せることを言い、本発明のＥＬクランプかかる安定化運
転によって輝度が要求初期輝度に一致するように調整さ
れた上で、初めて実用に供される。従って実用に供され
る場合のＥＬクランプ課電条件は安定化運転における課
電条件と同一であり、上記の例で言えば１４５Ｖ、１ｋ
Ｈｚである。従来のＥＬクランプは要求初期輝度に合致
する初期輝度が得られる課電条件上記の例で言えば１３
５Ｖ、１ｋＨｚで実用に供される。By driving the EL clamp under the above-mentioned energizing conditions, an initial brightness higher than the required initial brightness, in the above example, an initial brightness of 250 Cd7m'' can be obtained.
If the L clamp continues to be driven, the EL clamp brightness will rapidly decrease over time, and after that time the required initial brightness will be 200 Cd7m'' in the above example.In the present invention, the EL clamp brightness will be reduced at this stage. It is put into practical use as a product with a brightness that matches the initial brightness.As mentioned above, stabilization operation in the present invention means that the brightness is higher than the required initial brightness in advance before it is put into practical use as an EL clamp product. This means that the EL clamp is continuously driven under the obtained energizing conditions, and the EL clamp brightness is lowered until it matches the required initial brightness. It is only after adjustment that it is put into practical use.Therefore, the EL clamp energizing conditions when put into practical use are the same as the energizing conditions in stabilization operation, and in the above example, 145V, 1k.
It is Hz. In the above example, the conventional EL clamp has a power application condition of 13 to obtain an initial brightness that matches the required initial brightness.
It is put into practical use at 5V and 1kHz.
（作用）
第２図はＥＬクランプ輝度−時間特性すなわち寿命特性
を示すものである。図において曲線Ａは従来のＥＬクラ
ンプ寿命特性を示し、曲線Ｂは曲線Ａの寿命特性を示し
ているＥＬクランプ同一特性を有するＥＬクランプある
が実用前に予め前記した安定化運転を行った本発明によ
るＥＬクランプ寿命特性を示す。(Function) FIG. 2 shows the EL clamp luminance-time characteristics, that is, the life characteristics. In the figure, curve A shows the life characteristics of the conventional EL clamp, and curve B shows the life characteristics of the conventional EL clamp.There is an EL clamp that has the same characteristics as that of curve A, but the present invention was subjected to the stabilization operation described above before being put to practical use. EL clamp life characteristics are shown below.
ＥＬ、ランプの実数目盛で表わした輝度−時間特性は曲
線ＡおよびＢに示されているような、運転時間の初期に
おける輝度低下が極めて著しく、時間の経過と共に輝度
低下が緩やかになる傾向をもつ。従って要求初期輝度Ｘ
。に合致した初期輝度が得られる課電条件で駆動し実用
に供される曲線Ａの場合においては初期輝度が比較的短
い時間Ｙ。で半減するが、曲線Ｂの場合は要求初期輝度
Ｘｏより高い輝度Ｘ１が得られる課電条件で駆動し、輝
度を低下させ、Ｙ１時間後に輝度がＸｏに合致するよう
になった段階で実用に供されるので、実用に供される以
前に予めＹ１時間迄の急峻な輝度低下がカットされてお
り、実用に供された後の輝度の低下が緩やかで、輝度が
要求初期輝度Ｘｏから半減する迄の時間Ｙ２−Ｙ１を時
間Ｙ。よりもかなり長くすることができる。曲線Ｂにお
ける時間Ｙ１迄の、急峻な輝度低下を予めカットしてお
くための調整運転が８発明に言う安定化運転である。The luminance-time characteristics of EL and lamps expressed on a real number scale are shown in curves A and B, where the luminance decreases extremely rapidly at the beginning of operation time, and the luminance decrease tends to become more gradual as time passes. . Therefore, the required initial luminance
. In the case of curve A, which is driven under the energizing conditions that provide an initial brightness that matches Y and is put to practical use, the initial brightness is maintained for a relatively short time Y. However, in the case of curve B, it is driven under the charging conditions that provide a brightness X1 higher than the required initial brightness Xo, the brightness is reduced, and it is put into practical use when the brightness matches Xo after Y1 time. Since the brightness is provided for practical use, the steep decrease in brightness up to time Y1 has been cut in advance before being put to practical use, and the decrease in brightness after being put to practical use is gradual, and the brightness is halved from the required initial brightness Xo. The time until Y2-Y1 is the time Y. It can be much longer than that. The adjustment operation for cutting in advance the steep decrease in luminance up to time Y1 in curve B is the stabilization operation referred to in the eighth aspect of the invention.
ＥＬクランプ輝度低下はランプの使用雰囲気（温度、湿
度）により大きく変り、例えば温度４０℃、相対湿度９
０％の雰囲気（促進劣化の雰囲気条件）と温度２５℃、
相対湿度６０％の雰囲気とでは輝度が半減する迄の時間
は後者の方が数倍になるが、寿命特性の上記の傾向は変
らない。駆動電源の電圧、周波数が一定である固定電源
の場合と、ＥＬクランプ劣化等によるインピーダンスの
変動に伴って駆動電圧、周波数が変化し輝度低下補償能
力をもつインバータ電源の場合とでも、同様に後者の方
が寿命が数倍長くなるが寿命特性の上記傾向は変らない
。The reduction in EL clamp brightness varies greatly depending on the atmosphere in which the lamp is used (temperature, humidity). For example, at a temperature of 40°C and a relative humidity of 9.
0% atmosphere (atmosphere condition for accelerated deterioration) and temperature 25℃,
In an atmosphere with relative humidity of 60%, the time it takes for the luminance to decrease by half is several times longer in the latter case, but the above-mentioned tendency of the life characteristics does not change. The latter is the same in the case of a fixed power supply in which the drive power supply voltage and frequency are constant, and in the case of an inverter power supply that has the ability to compensate for brightness decreases in which the drive voltage and frequency change due to impedance fluctuations due to EL clamp deterioration, etc. Although the life is several times longer in the case of , the above-mentioned tendency of the life characteristics does not change.
なお、ｇＬランプの寿命特性について細かく言えば、″
゛運転開始直後の短時間（通常０．５〜３時間）の間に
ＥＬクランプ発光効率が向上し、このため輝度も一時的
に上昇するという現象が一般にみられるが、第２図では
時間スケールの関係でこの輝度上昇は表れていない。In addition, if we talk about the life characteristics of the gL lamp in detail,
゛It is generally seen that the EL clamp luminous efficiency improves during a short period of time (usually 0.5 to 3 hours) immediately after the start of operation, and therefore the brightness also temporarily increases, but Figure 2 shows the time scale. This increase in brightness is not visible due to the relationship.
（実施例）
比較例１
厚す１００μｍのアルミニウム背面電極層の上ニ、順次
、シアノエチルセルローズ（！： ＢＪＬＴ １０ ｇ
との混合組成物から成る厚さ３０μｍの絶縁層、螢光体
ＺｎＳ：Ｃｕ、Ｃ６（発光色青緑）と赤色螢光顔料をシ
７ノエチルセルー−ズに分散させた組成物から成る厚さ
５０μｍの発光色が白色の発光層、および厚さ７５μｍ
のポリエチレンテレフタレートフィルムの片面にインジ
ュウムー錫酸化物層を蒸着した透明電極層を積場し、次
いでこれら全体を捕水用ナイロンフィルムで覆い、更に
全体を防水用ＰＣＴＦＥフィルムにより密封した構造の
ＥＬクランプ１３５Ｖ、 １ ｋＨｚの課電条件にて
駆動し、要求初期輝度と同じ２００Ｃｄ／ｍ”の初期輝
度を得た。これを温度４０℃、相対湿度９０％の雰囲気
中で連続駆動した所、２００時間で輝度が半減し１こ。(Example) Comparative Example 1 Cyanoethyl cellulose (!: BJLT 10 g
A 30 μm thick insulating layer made of a mixed composition of ZnS:Cu, a 50 μm thick phosphor made of a composition of C6 (emitting color: bluish-green) and a red fluorescent pigment dispersed in ethyl cerose. A light-emitting layer with a white emission color and a thickness of 75 μm
EL clamp 135V has a structure in which a transparent electrode layer with an indium tin oxide layer deposited on one side of a polyethylene terephthalate film is stacked, the whole is then covered with a water-trapping nylon film, and the whole is further sealed with a waterproof PCTFE film. , the initial brightness of 200 Cd/m", which is the same as the required initial brightness, was obtained by driving under a power supply condition of 1 kHz. When this was continuously driven in an atmosphere with a temperature of 40 degrees Celsius and a relative humidity of 90%, after 200 hours, The brightness has been reduced by half.
実施例１〜３
比較例１と同一構造で同一特性をもっＥＬクランプつき
、それぞれ表１の第２欄記載の課電条件にてＥＬクラン
プ駆動しそれぞれ表１の第３欄記載の初期輝度を得た。Examples 1 to 3 An EL clamp having the same structure and the same characteristics as Comparative Example 1 was driven under the energizing conditions listed in the second column of Table 1, and the initial brightness was set as indicated in the third column of Table 1. Obtained.
これらを温度３０℃、相対湿度５０％の雰囲気中で連続
駆動した所、それぞれ表１の第４欄記載の時間後に輝度
が要求初期輝度である２ ００ Ｃｄ／ｍ２に低下した
。When these were continuously driven in an atmosphere at a temperature of 30°C and a relative humidity of 50%, the luminance decreased to 200 Cd/m2, which is the required initial luminance, after the time indicated in the fourth column of Table 1.
ここでＥＬクランプ駆動を一旦中止し、２４時間放置後
、それぞれ上記と同一課電条件にて再駆動して要求初期
輝度２００ Ｃｄ７ｍ”が得られ表１第５欄記載の時間
後に輝度が１００ Ｃｄ／ｍ２に半減した。従って輝度
が要求初期輝度である２ ００ Ｃｄ／ｍ２から半減す
る迄の時間が比較例１の場合に較べて長くなった輝度半
減時間の延長効果は表１第６欄に示す通りである。At this point, the EL clamp drive was temporarily stopped, and after being left for 24 hours, the required initial brightness was 200 Cd7m" by driving again under the same charging conditions as above, and after the time listed in the fifth column of Table 1, the brightness was 100 Cd. Therefore, the effect of extending the luminance halving time, which is longer than in Comparative Example 1, is shown in column 6 of Table 1. As shown.
表 １
比較例２
絶縁層がシアノエチルプルランとＪＴｉ０５との混合組
成物から成る点と、発光層がＺｎＳ ：Ｃｕ、（Ｊ（発
光色を緑）をシフ／エチルプルランに分散させた組成物
から成る点板外は比較例１と同一の構造を有するＥＬク
ランプ１２４Ｖ。Table 1 Comparative Example 2 The insulating layer is made of a mixed composition of cyanoethyl pullulan and JTi05, and the emitting layer is made of a composition in which ZnS:Cu, (J (emission color is green) is dispersed in Schiff/ethyl pullulan. Outside the point plate is an EL clamp 124V having the same structure as Comparative Example 1.
１ ｋＨｚの課電条件にて駆動し、！！本初期輝度に等
しい２００ Ｃｄ７ｍ”の初期輝度を得た。これを比較
例１と同じ条件の雰囲気中で連続駆動した所２００時間
で輝度が半減した。Driven under 1 kHz charging condition,! ! An initial brightness of 200 Cd7m'', which is equivalent to the actual initial brightness, was obtained. When this was continuously driven in an atmosphere under the same conditions as Comparative Example 1, the brightness was halved after 200 hours.
実施例４〜５
比較例２と同一構造で同一特性を有するＥＬクランプつ
き、実施例１〜３と同じくして安定化運転を行った。そ
れぞれの課電条件、初期輝度、輝度が要求初期輝度であ
る２ ００ Ｃｄ７ｍ”に低下する迄の時間すなわち安
定化運転の時間は表２の第２〜４徊に示す通りであった
。その後実施例１〜３の場合と同じくして放置、再駆動
しく再駆動の課電条件も表２の第２ｍ記載のＨＷ条件に
同じ）、再駆動後に輝度が要求輝度である２００Ｃｄ／
ｍ”がら半減する迄の時間はそれぞれ表２の第５欄に示
す通りであった。Examples 4 to 5 An EL clamp having the same structure and characteristics as Comparative Example 2 was provided, and stabilization operation was performed in the same manner as in Examples 1 to 3. The respective energization conditions, initial brightness, and time required for the brightness to decrease to the required initial brightness of 200 Cd7m'', that is, the stabilizing operation time, were as shown in Sections 2 to 4 of Table 2. In the same way as in Examples 1 to 3, the power supply conditions for re-driving are the same as the HW conditions listed in No. 2m of Table 2), and the brightness after re-driving is 200Cd/
The time required for the amount of m'' to decrease by half is as shown in the fifth column of Table 2.
従って比較例２に較べた、輝度半減時間の延長効果は表
２の第６！＃ｉに示す通りとなる。Therefore, compared to Comparative Example 2, the effect of extending the luminance half-life time is No. 6 in Table 2! As shown in #i.
表
上記実施例においては温度３０℃、相対湿度５０％の雰
囲気で安定化運転を行ったが、安定化運転の雰囲気条件
は勿論これに限られず、任意に選んで差し支えない。し
かし安定化運転の時間を短縮するためには輝度低下を促
進するような比較的高い温度で、また湿気による螢光体
の劣化を防ぐためには低湿度で行うことが望ましく、３
０℃〜５０℃、相対湿度５０％以下の条件で行うのが好
ましい。また安定化運転を行うのが好ましい。また安定
化運転を行うに当り初期輝度を要求初期輝度よりどの程
度高く設定するかはＥＬクランプ実用雰囲気における寿
命特性を勘案して定めるのが望ましい。設定輝度が低く
要求初期輝度に近付き過ぎると、急峻な輝度低下を予め
カットする作用が不充分になり、安定化運転の効果、寿
命延長効果が薄れる。Although the stabilizing operation was carried out in an atmosphere with a temperature of 30° C. and a relative humidity of 50% in the above-mentioned example, the atmospheric conditions for the stabilizing operation are of course not limited to these, and may be arbitrarily selected. However, in order to shorten the stabilization time, it is desirable to perform the stabilization operation at a relatively high temperature that promotes brightness reduction, and at low humidity to prevent deterioration of the phosphor due to moisture.
It is preferable to carry out under the conditions of 0°C to 50°C and relative humidity of 50% or less. It is also preferable to perform stabilization operation. Furthermore, it is desirable to determine how much higher the initial brightness is to be set than the required initial brightness in stabilizing operation, taking into consideration the life characteristics of the EL clamp in a practical atmosphere. If the set brightness is low and too close to the required initial brightness, the effect of pre-cutting a steep drop in brightness will be insufficient, and the effect of stabilizing operation and extending the life will be diminished.
方、要求初期輝度よりも徒らに高く設定しても安定化運
転の時間が長くなる不利を招く。更に本説明においては
ＥＩ、ランプを駆動する電源が固定電源である場合を主
体に説明したが、インバータ電源を用いて差支えないこ
とは勿論である。ただし、安定化運転においてインバー
タ電源を用いて駆動すると安定化運転の時間が長くなる
不利があるので、安定化運転の駆動は固定電源で行い、
実用に供する場合の駆動をインバータ電源により行うこ
とにした方がよい。On the other hand, if the luminance is set much higher than the required initial luminance, the time required for stabilization operation will become longer. Further, in this description, the case where the power source for driving the EI and the lamp is a fixed power source has been mainly explained, but it goes without saying that an inverter power source may be used. However, using an inverter power supply during stabilization operation has the disadvantage of lengthening the stabilization time, so use a fixed power supply to drive the stabilization operation.
For practical use, it is better to use an inverter power source for driving.
（考案の効果）
本発明のＥＬクランプ安定化運転により予め急峻な輝度
低下がカットされているので、実用に供した場合の輝度
低下が従来のＥＬクランプ較べて緩やかであり、輝度が
それだけ安定化し、輝度が要求初期輝度から半減する迄
の時間が、上記実施例からも明らかな通り、従来のＥＬ
クランプ較べて大巾に延長され、実用寿命が延長される
。また、本発明のＥＬクランプ実用に供されるに先立つ
て課電駆動されているので、前述したＥＬクランプ運転
時間の初期に発光効率が向上するという効果をランプの
実用前に既に享受しており、従って従来のＥＬクランプ
異なりランプの実用開始の当初から向上した高い発光効
率で運転でき、消費電力を低減できるという利点もある
。(Effects of the invention) Since the EL clamp stabilization operation of the present invention cuts out the steep brightness drop in advance, when it is put into practical use, the brightness drop is gentler than that of the conventional EL clamp, and the brightness is stabilized accordingly. As is clear from the above example, the time it takes for the brightness to decrease by half from the required initial brightness is longer than that of the conventional EL.
Compared to clamps, it is much longer and has a longer practical life. In addition, since the EL clamp of the present invention is energized and driven before being put into practical use, the above-mentioned effect of improving luminous efficiency at the beginning of the EL clamp operation time is already enjoyed before the lamp is put into practical use. Therefore, unlike conventional EL clamps, this lamp has the advantage of being able to operate with high luminous efficiency, which has been improved since the beginning of the lamp's practical use, and reducing power consumption.
第１図は本発明の対象とする有機分散型ＥＬランプの断
面図であり、第２図はＥＬクランプ寿命特性を示し、曲
線Ａが従来りＥＬクランプ寿命特性を、曲線Ｂが本発明
によるＥＬクランプ寿命特性を示している。
（符号の説明）
１：背面電極層、２：絶縁層、３：発光層、４：透明冨
極層、５：捕水用フィルム、６：防水用外装フィルム、
Ｘｏ：要求初期輝度第 ７ 図FIG. 1 is a cross-sectional view of an organic dispersion type EL lamp that is the object of the present invention, and FIG. 2 shows the EL clamp life characteristics, where curve A is the conventional EL clamp life characteristic and curve B is the EL lamp according to the present invention. It shows the clamp life characteristics. (Explanation of symbols) 1: back electrode layer, 2: insulating layer, 3: light emitting layer, 4: transparent polar layer, 5: water trapping film, 6: waterproof exterior film,
Xo: Required initial brightness Figure 7
Claims (2)
散させた組成物から成る発光層と透明電極層とを順次積
層して形成したエレクトロルミネツセンスランプにおい
て、該ランプの実用前に予め要求初期輝度よりも高い輝
度が得られる課電条件にてランプの安定化運転を行うこ
とによりランプの輝度を低下させ、輝度が要求初期輝度
に一致するように調整されていることを特徴とするエレ
クトロルミネツセンスランプ。(1) In an electroluminescent lamp formed by sequentially laminating a light-emitting layer made of a composition in which a phosphor is dispersed in an organic polymer resin and a transparent electrode layer on a back electrode layer, the lamp can be put to practical use. The brightness of the lamp is lowered by performing stabilization operation of the lamp in advance under energizing conditions that provide a brightness higher than the required initial brightness, and the brightness is adjusted to match the required initial brightness. Features an electroluminescent lamp.
分散させた組成物から成る発光層と透明電極層とを順次
積層して形成したエレクトロルミネツセンスランプを、
その実用前に予め、要求初期輝度よりも高い輝度が得ら
れる課電条件にて駆動する安定化運転を行い、これによ
りランプの輝度を低下させて輝度を要求初期輝度に一致
するように調整することを特徴とするエレクトロルミネ
ツセンスランプの輝度安定化方法。(2) An electroluminescent lamp formed by sequentially laminating a light-emitting layer made of a composition in which a phosphor is dispersed in an organic polymer-resin and a transparent electrode layer on a back electrode layer;
Before putting it into practical use, stabilization operation is performed in advance under energizing conditions that provide a brightness higher than the required initial brightness, thereby reducing the brightness of the lamp and adjusting the brightness to match the required initial brightness. A method for stabilizing the brightness of an electroluminescent lamp, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2111476A JPH0410390A (en) | 1990-04-26 | 1990-04-26 | Electroluminescent lamp and method for stabilizing brightness thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2111476A JPH0410390A (en) | 1990-04-26 | 1990-04-26 | Electroluminescent lamp and method for stabilizing brightness thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0410390A true JPH0410390A (en) | 1992-01-14 |
Family
ID=14562225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2111476A Pending JPH0410390A (en) | 1990-04-26 | 1990-04-26 | Electroluminescent lamp and method for stabilizing brightness thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0410390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807922A (en) * | 2012-11-02 | 2014-05-21 | 大金工业株式会社 | Vertical type air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6070694A (en) * | 1983-09-27 | 1985-04-22 | 富士通株式会社 | Method of producing thin film el device |
| JPS62252093A (en) * | 1986-04-24 | 1987-11-02 | 沖電気工業株式会社 | Stabilizer of thin film ac electroluminescence display panel |
| JPS6366895A (en) * | 1986-09-05 | 1988-03-25 | 松下電器産業株式会社 | Method of aging thin film el device |
-
1990
- 1990-04-26 JP JP2111476A patent/JPH0410390A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6070694A (en) * | 1983-09-27 | 1985-04-22 | 富士通株式会社 | Method of producing thin film el device |
| JPS62252093A (en) * | 1986-04-24 | 1987-11-02 | 沖電気工業株式会社 | Stabilizer of thin film ac electroluminescence display panel |
| JPS6366895A (en) * | 1986-09-05 | 1988-03-25 | 松下電器産業株式会社 | Method of aging thin film el device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807922A (en) * | 2012-11-02 | 2014-05-21 | 大金工业株式会社 | Vertical type air conditioner |
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