JP2780216B2 - Electroluminescent lamp - Google Patents
Electroluminescent lampInfo
- Publication number
- JP2780216B2 JP2780216B2 JP5010349A JP1034993A JP2780216B2 JP 2780216 B2 JP2780216 B2 JP 2780216B2 JP 5010349 A JP5010349 A JP 5010349A JP 1034993 A JP1034993 A JP 1034993A JP 2780216 B2 JP2780216 B2 JP 2780216B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- film
- color conversion
- electroluminescent lamp
- conversion layer
- 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.)
- Expired - Lifetime
Links
- 238000006243 chemical reaction Methods 0.000 claims description 70
- 239000000049 pigment Substances 0.000 claims description 46
- 239000010419 fine particle Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 129
- 239000010408 film Substances 0.000 description 98
- 238000007639 printing Methods 0.000 description 18
- 229920005992 thermoplastic resin Polymers 0.000 description 15
- 239000012463 white pigment Substances 0.000 description 15
- 239000003086 colorant Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 239000007850 fluorescent dye Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010030 laminating Methods 0.000 description 7
- 239000012790 adhesive layer Substances 0.000 description 6
- 239000011324 bead Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920005749 polyurethane resin Polymers 0.000 description 5
- 229910052984 zinc sulfide Inorganic materials 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 108010043121 Green Fluorescent Proteins Proteins 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000013039 cover film Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 210000002500 microbody Anatomy 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 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)
Description
【０００１】[0001]
【産業上の利用分野】本発明は電界発光灯に関し、特に
色変換層に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electroluminescent lamp , and more particularly, to an electroluminescent lamp .
It relates to a color conversion layer .
【０００２】[0002]
【従来の技術】従来の電界発光灯６０は、図１４に要部
拡大断面図で示すように、後述の積層体からなる略矩形
の平面形状を有する電界発光素子６７をフッ素系樹脂等
の防湿性を有する外皮フィルム６８，６９により密閉封
止した構造を有する。2. Description of the Related Art A conventional electroluminescent lamp 60 is, as shown in an enlarged sectional view of a main part in FIG. The structure is hermetically sealed with outer skin films 68 and 69 having properties.
【０００３】上記電界発光素子２７は、下層から順に、
背面電極６１，反射絶縁層６２，発光層６３，透明電極
６４を積層・形成したものである。なお、図中６５，６
６は上記電界発光素子６７の上下に配置されたポリアミ
ド等の吸湿フィルムからなる吸湿層である。一般的に電
界発光灯用の蛍光体は青緑色発光を示すため、発光色を
変換するためには特開昭６１−８８９６号公報に開示さ
れているように蛍光顔料や蛍光染料を発光層中に混ぜ込
んだり、特開昭６０−８４５８０号公報に開示されてい
るように蛍光顔料を含むカラーフィルタを紫外線でパタ
ーンニングしたものを電界発光素子の前面に配設する方
法が採用されており、発光効率を重要視する場合は前
者、寿命を重要視する場合は主に後者の方法が用いられ
る。The above-mentioned electroluminescent device 27 is arranged in order from the lower layer.
A back electrode 61, a reflective insulating layer 62, a light emitting layer 63, and a transparent electrode 64 are laminated and formed. Incidentally, 65, 6 in the figure
Reference numeral 6 denotes a moisture-absorbing layer made of a moisture-absorbing film such as polyamide disposed above and below the electroluminescent element 67. In general, a phosphor for an electroluminescent lamp emits blue-green light. To convert the luminescent color, a fluorescent pigment or a fluorescent dye is used in the luminescent layer as disclosed in JP-A-61-8896. Or a method in which a color filter containing a fluorescent pigment is patterned with ultraviolet light and disposed on the front surface of the electroluminescent element as disclosed in JP-A-60-84580. The former method is used when the luminous efficiency is important, and the latter method is mainly used when the lifetime is important.
【０００４】また、一般的に白色発光の電界発光灯は発
光層中に蛍光体の青緑色発光の補色であるピンク系の蛍
光顔料を混ぜ込んだり、発光層の前面にピンク系の蛍光
顔料層を設けることによって得られていた。しかし、こ
れらの白色発光電界発光灯は非点灯時のボディカラーが
蛍光顔料のピンク色を呈するため、半透過タイプの液晶
に用いた場合、非点灯時のコントラストが悪くなり、視
認性が低下するという問題があった。この問題を解決す
るため、一般的にはＺｎＳにＣｕを添加したＧｒｅｅｎ
発光蛍光体、ＺｎＳにＣｕを微量添加したＢｌｕｅ発光
蛍光体、ＺｎＳにＭｎを添加したＯｒａｎｇｅ発光蛍光
体の３種を適量混合することによって、あるいは、Ｚｎ
ＳにＣｕを添加したＧｒｅｅｎ発光蛍光体とＺｎＳにＭ
ｎを添加したＯｒａｎｇｅ発光蛍光体の２種を適量混合
することによって得られることが公知である。また、特
開昭６３−１９７９６号公報、特開平２−１００２８８
号公報や実開平１−１７６３９９号公報等に開示されて
いるように発光層の前方に白色のフィルタ（例えば拡散
板など）を配設する方法が採用されている。In general, a white light emitting electroluminescent lamp includes a light emitting layer in which a pink fluorescent pigment, which is a complementary color of blue-green light emitted from a phosphor, is mixed, or a pink fluorescent pigment layer is provided in front of the light emitting layer. Has been obtained by providing. However, since these white light-emitting electroluminescent lamps exhibit a pink color of the fluorescent pigment when the body color is not lit, when used in a semi-transmissive liquid crystal, the contrast at the time of non-lighting is deteriorated, and the visibility is reduced. There was a problem. In order to solve this problem, Green, which is generally obtained by adding Cu to ZnS, is used.
By mixing three kinds of light-emitting phosphors, a blue light-emitting phosphor obtained by adding a small amount of Cu to ZnS, and an orange light-emitting phosphor obtained by adding Mn to ZnS, or
Green luminescent phosphor with Cu added to S and ZnS with M
It is known that it can be obtained by mixing two kinds of Orange light emitting phosphors to which n is added in an appropriate amount. Also, JP-A-63-19796, JP-A-2-100288
A method of disposing a white filter (for example, a diffusion plate or the like) in front of the light-emitting layer as disclosed in Japanese Unexamined Patent Application Publication No. Hei.
【０００５】また、同一発光面上で異なった発光色を得
る方法としては、特開昭６０−８４５８０号公報に開示
されているように、蛍光顔料を含むカラーフィルタに所
定のパターンに紫外線照射を行って、発光色を２色化す
る方法が採用されている。As a method of obtaining different emission colors on the same light emitting surface, as disclosed in Japanese Patent Application Laid-Open No. 60-84580, a color filter containing a fluorescent pigment is irradiated with ultraviolet rays in a predetermined pattern. In this case, a method of making the emission color two colors is adopted.
【０００６】[0006]
【発明が解決しようとする課題】ところで上記の構造の
電界発光灯において、蛍光顔料や蛍光染料を発光層に混
ぜ込んだ場合、所定の発光色を実現するためには蛍光顔
料、蛍光染料を多量に必要であり、また、反射絶縁層６
２と発光層６３の界面を蛍光顔料や蛍光染料が覆うた
め、反射絶縁層６２の反射率が低下し、色変換する前の
電界発光灯の輝度の約８０％に低下してしまう。また、
フィルタを発光層前方に配設する場合、フィルタはある
範囲の波長のものから一定波長の光を取り出すため、光
が透過しにくい波長帯があり、このため大幅に輝度が低
下すると共に、フィルタ層を設けることにより、電界発
光灯の膜厚が厚くなるという問題があった。また、白色
発光を得る場合、蛍光体を２色あるいは３色混合で使用
すると、発光の肌理が粗い、輝度が低い、それぞれの蛍
光体の寿命が異なるため色ズレが大きいという問題があ
り、発光層の前方に白色フィルタを配設すると、白色フ
ィルタの透過率が低いため輝度が低く、また、フィルタ
からの反射光によって蛍光顔料が再励起され発光色が赤
みを帯びたり、また、フィルムを配設するための工数が
かかるという問題があった。さらに、紫外線でパターン
ニングしたカラーフィルタを使用して同一発光面上で異
なった発光色を得る場合、製造工程が複雑で多大な工数
がかかるという問題があった。In the electroluminescent lamp having the above-described structure, when a fluorescent pigment or a fluorescent dye is mixed in the luminescent layer, a large amount of the fluorescent pigment or the fluorescent dye is required to realize a predetermined luminescent color. And the reflective insulating layer 6
Since the fluorescent pigment or the fluorescent dye covers the interface between the light emitting layer 2 and the light emitting layer 63, the reflectance of the reflective insulating layer 62 is reduced, and the luminance is reduced to about 80% of the luminance of the electroluminescent lamp before the color conversion. Also,
When the filter is disposed in front of the light-emitting layer, the filter extracts light of a certain wavelength from a certain range of wavelengths, so that there is a wavelength band in which light is difficult to transmit. Has a problem that the film thickness of the electroluminescent lamp is increased. In addition, in the case of obtaining white light emission, if phosphors are used in a mixture of two colors or three colors, there is a problem that the texture of light emission is rough, the luminance is low, and the color shift is large because the life of each phosphor is different. When a white filter is provided in front of the layer, the luminance is low because the transmittance of the white filter is low, the fluorescent pigment is re-excited by the reflected light from the filter, and the emission color becomes reddish. There is a problem that it takes a lot of man-hours to set up. Further, when different emission colors are obtained on the same light emitting surface using a color filter patterned with ultraviolet rays, there is a problem that the manufacturing process is complicated and a large number of steps are required.
【０００７】本願発明は、上記問題点を顧みて提案され
たもので、その目的は輝度を低下させることなく、しか
も容易かつ安価な電界発光灯の色変換を実現する薄型電
界発光灯の構造を提供することにある。[0007] The present invention has been proposed unto above problems, and an object without decreasing the brightness, and easily and inexpensive field structure of the light emitting lamp thin electroluminescent lamp to achieve color conversion Is to provide.
【０００８】[0008]
【課題を解決するための手段】本発明の電界発光灯は、
発光層の前方にフィルム上に形成した色変換層を他の層
と密着して配設したことを特徴とする。An electroluminescent lamp according to the present invention comprises:
A color conversion layer formed on a film is provided in close contact with another layer in front of the light emitting layer.
【０００９】また、前記色変換層は、樹脂と蛍光顔
（染）料とガラスなどの透明微小体とを具備することを
特徴とする。[0009] The color conversion layer is characterized by comprising a resin, a fluorescent face (dying) material, and a transparent fine body such as glass.
【００１０】また、前記フィルムと前記他の層との組合
せが、それぞれ吸湿フィルムと透明電極の基材フィルム
（または外皮フィルム）、透明電極の基材フィルムと外
皮フィルム（または吸湿フィルム）、外皮フィルムと吸
湿フィルム（または透明電極の基材フィルム）、透明フ
ィルムと外皮フィルムであることを特徴とする。The combination of the film and the other layer may be a moisture absorbing film and a transparent electrode base film (or a skin film), a transparent electrode base film and a skin film (or a moisture absorbing film), a skin film, respectively. And a moisture-absorbing film (or a base film of a transparent electrode), a transparent film and a skin film.
【００１１】また、色変換層と酸化チタンなどの白色顔
料層を形成したフィルムを発光層の前方に配設したこと
を特徴とする。[0011] A film having a color conversion layer and a white pigment layer such as titanium oxide is provided in front of the light emitting layer.
【００１２】また、複数の色変換層を形成したフィルム
を発光層の前方に配設したことを特徴とする。[0012] Further, a film on which a plurality of color conversion layers are formed is disposed in front of the light emitting layer.
【００１３】また、本発明の電界発光灯を製造する方法
においては、長尺のフィルム上に色変換層を連続印刷す
る工程と、該色変換層を印刷したフィルムを他の層に熱
圧着する工程とを含むことを特徴とする。Further, in the method of manufacturing an electroluminescent lamp according to the present invention, a step of continuously printing a color conversion layer on a long film, and thermocompression bonding the film on which the color conversion layer is printed to another layer. And a step.
【００１４】また、フィルム上に色変換層を選択的に印
刷してパターン化した色変換層を形成する工程を有する
ことを特徴とする。Further, the method is characterized in that the method further comprises a step of selectively printing the color conversion layer on the film to form a patterned color conversion layer.
【００１５】[0015]
【作用】発光層の前方にフィルム上に形成した色変換層
を他の層と密着して配設することにより、輝度低下を引
き起こすことなく、任意の発光色に変換できる薄型の電
界発光灯を提供することができる。また、長尺のフィル
ム上に、樹脂／（蛍光顔（染）料と透明微小体との和）
が重量比で１〜４に調合したインクを連続印刷すること
により、印刷不良や巻き取り時のブロッキングを防止で
き、しかも、汎用の製造装置を使用できるため、前記電
界発光灯を安価に製造できる。また、透明微小体の混合
割合を変更することにより、色変換層の濃度を自由に変
えることができ、任意の発光色に不具合なく変換するこ
とができる。さらに、前記色変換層と白色顔料層の２層
にすることにより、点灯非点灯時ともに白色の電界発光
灯を容易かつ低コストで実現できる。また、発光層の前
方に透光性フィルムの上にパターン化して形成した２色
以上の色変換層を配設することにより、容易にかつ精度
よく電界発光灯の多色化が実現できる。By providing a color conversion layer formed on a film in front of a light emitting layer in close contact with another layer, a thin electroluminescent lamp capable of converting to an arbitrary luminescent color without causing a decrease in luminance is provided. Can be provided. In addition, resin / (sum of fluorescent face (dying) material and transparent fine body) on long film
Can continuously prevent printing failure and blocking at the time of winding up by continuously printing ink prepared in a weight ratio of 1 to 4, and furthermore, since a general-purpose manufacturing apparatus can be used, the electroluminescent lamp can be manufactured at low cost. . In addition, by changing the mixing ratio of the transparent fine particles, the density of the color conversion layer can be freely changed, and the color can be converted into an arbitrary luminescent color without any problem. Furthermore, by using the two layers of the color conversion layer and the white pigment layer, a white electroluminescent lamp can be realized easily and at low cost both in lighting and in non-lighting. In addition, by providing a color conversion layer of two or more colors formed by patterning on a translucent film in front of the light emitting layer, it is possible to easily and accurately realize multicolor electroluminescent lamps.
【００１６】[0016]
【実施例】本発明の第一実施例として表面側吸湿フィル
ムに色変換層を塗布した場合の電界発光灯の構造および
その製造方法について、図１〜３を参照しながら説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a first embodiment of the present invention, the structure of an electroluminescent lamp in which a color conversion layer is applied to a front-side moisture absorbing film and a method of manufacturing the same will be described with reference to FIGS.
【００１７】本発明の電界発光灯１０は図１の要部拡大
断面図に示すように、下層から順に、アルミ箔からなる
背面電極１、有機バインダ中にチタン酸バリウム等の絶
縁物を分散した反射絶縁層２、有機バインダ中に硫化亜
鉛を銅で付活した蛍光体を分散した発光層３、透明電極
４を形成した電界発光素子７の上下にポリアミド等の吸
湿フィルム５，６を貼付け、フッ素系樹脂等からなる外
皮フィルム８，９で封止した構造をしている。In the electroluminescent lamp 10 of the present invention, as shown in an enlarged sectional view of a main part of FIG. 1, an insulating material such as barium titanate is dispersed in a back electrode 1 made of aluminum foil and an organic binder in order from the lower layer. Moisture-absorbing films 5 and 6 made of polyamide or the like are attached to the upper and lower sides of a reflective insulating layer 2, a light-emitting layer 3 in which a phosphor obtained by activating zinc sulfide with copper in an organic binder, and an electroluminescent element 7 having a transparent electrode 4 formed thereon. It has a structure sealed with outer films 8 and 9 made of fluorine resin or the like.
【００１８】通常、電界発光灯１０の吸湿フィルム５，
６はポリアミド系フィルム（例えばナイロン６）の表面
に接着層として例えばナイロン１２あるいはポリオレフ
ィン系接着剤６ａをドライラミしたものが一般的である
が、本発明では表面側吸湿フィルム５の接着層に色変換
の機能を付加するため、グリーンの蛍光顔料（例えば、
シンロイヒ（株）製ＦＡ００５）を熱可塑性樹脂（例え
ばポリウレタン系樹脂等）に混合した塗料を、図２
（ａ），（ｂ）に示すように例えばグラビアコータ３０
やコンマコータ２９等により連続印刷し、長尺の吸湿フ
ィルム５の基材５ｂの上に色変換層５ａを形成する。さ
らに、これらの吸湿フィルム５を任意の形状に切断後、
色変換層５ａ側をラミネートロールや熱プレス等により
透明電極４上に熱圧着し密着させる。Usually, the moisture absorbing film 5 of the electroluminescent lamp 10
In general, nylon 6 or a polyolefin adhesive 6a is dry-laminated as an adhesive layer on the surface of a polyamide film (for example, nylon 6). Green fluorescent pigment (for example,
FIG. 2 shows a coating material obtained by mixing FA005 (Shinloich Co., Ltd.) with a thermoplastic resin (eg, polyurethane resin).
For example, as shown in FIGS.
The color conversion layer 5a is formed on the base material 5b of the long moisture-absorbing film 5 by continuous printing using a comma coater 29 or the like. Furthermore, after cutting these moisture absorbing films 5 into an arbitrary shape,
The color conversion layer 5a side is thermocompression-bonded to the transparent electrode 4 by a laminating roll, a hot press, or the like, and is brought into close contact therewith.
【００１９】本発明によれば、吸湿フィルムの接着層に
色変換層としての機能を付加することにより、従来の製
造装置および組立て工程を変更することなく、色変換が
可能な薄型の電界発光灯を安価に量産できる。例えば、
表面側吸湿フィルムに熱可塑性樹脂とピンク系蛍光顔料
を重量比３：１で混合したものを、塗膜厚２０〜２５μ
ｍで印刷した色変換層をＢｌｕｅ−Ｇｒｅｅｎ発光する
電界発光素子の表面に密着させた場合、図３の色度図に
矢印Ａで示すように、１００Ｖ−４００Ｈｚで輝度９０
［ｃｄ／ｍ2 ］、色度ｘ＝．１８２、ｙ＝．４５０の緑
色発光のものが色変換後、輝度９０［ｃｄ／ｍ2 ］、色
度ｘ＝．３３４、ｙ＝．４１４と輝度低下をほとんど引
き起こさずにホワイト発光を実現することができる。ま
た、表面側吸湿フィルムに熱可塑性樹脂とＧｒｅｅｎ系
蛍光顔料を重量比４：１で混合したものを、塗膜厚３５
〜４０μｍで印刷した色変換層をＢｌｕｅ−Ｇｒｅｅｎ
発光する電界発光素子の表面に密着させた場合、図３の
色度図に矢印Ｂで示すように、１００Ｖ−４００Ｈｚで
輝度９０［ｃｄ／ｍ2 ］、色度ｘ＝．１８２、ｙ＝．４
５０のものが色変換後、輝度１１５［ｃｄ／ｍ2 ］、色
度ｘ＝．２００、ｙ＝．６９０と輝度が向上し、しかも
Ｙｅｌｌｏｗ−Ｇｒｅｅｎ発光を実現することができ
る。ここで、輝度が向上したのは母体のＢｌｕｅ−Ｇｒ
ｅｅｎ発光の視感度より上がったためであり、変換後の
発光色によって視感度が異なるため、輝度の値は変動す
るが大幅な低下はない。According to the present invention, by adding a function as a color conversion layer to the adhesive layer of the moisture absorbing film, a thin electroluminescent lamp capable of color conversion without changing the conventional manufacturing apparatus and assembly process. Can be mass-produced at low cost. For example,
A film obtained by mixing a thermoplastic resin and a pink fluorescent pigment at a weight ratio of 3: 1 to a surface-side moisture-absorbing film has a coating thickness of 20 to 25 μm.
When the color conversion layer printed at m is adhered to the surface of the blue-green emitting electroluminescent element, as shown by an arrow A in the chromaticity diagram of FIG.
[Cd / m 2 ], chromaticity x =. 182, y =. After the color conversion, the green light emission of 450 has a luminance of 90 [cd / m 2 ] and a chromaticity x =. 334, y =. 414, white light emission can be realized with almost no decrease in luminance. A mixture of a thermoplastic resin and a green fluorescent pigment at a weight ratio of 4: 1 to a surface-side moisture absorbing film is applied to a film thickness of 35%.
The color conversion layer printed at ４０40 μm was applied to Blue-Green.
When the light emitting device is brought into close contact with the surface of the electroluminescent device that emits light, as shown by the arrow B in the chromaticity diagram of FIG. 3, the luminance is 90 [cd / m 2 ] at 100 V-400 Hz, and the chromaticity x =. 182, y =. 4
After the color conversion, the luminance of 115 [cd / m 2 ] and the chromaticity x =. 200, y =. 690, the luminance is improved, and yellow-green light emission can be realized. Here, the improvement in luminance is due to the Blue-Gr
This is because the luminous efficiency is higher than the luminous efficiency of the een emission, and since the luminous efficiency varies depending on the luminescent color after conversion, the luminance value fluctuates but does not significantly decrease.
【００２０】また、色変換層５ａはラミネートロールや
熱プレス等で熱圧着されるときに溶融するため、グラビ
アコータやコンマコータ等により吸湿フィルム５ｂ上に
連続印刷する際、ある程度の印刷ムラが生じても、発光
状態は変わらない。また、発光色は蛍光顔料の種類、濃
度、塗膜厚などによって決まるため、これらを制御する
することにより様々な発光色を実現することができる。
また、前記蛍光顔料のかわり蛍光染料を使用してもよい
し、両方を混ぜて使用してもよく、以下の実施例におい
ても同様である。また本発明では蛍光顔料、蛍光染料、
両者を混合したもの、および他の色変換できる蛍光体を
総称して蛍光顔（染）料と称するものとする。Further, since the color conversion layer 5a is melted when thermocompression-bonded by a laminating roll, a hot press or the like, when printing continuously on the moisture absorbing film 5b by a gravure coater, a comma coater or the like, a certain degree of printing unevenness occurs. However, the light emission state does not change. Further, since the luminescent color is determined by the type, concentration, coating thickness, etc. of the fluorescent pigment, various luminescent colors can be realized by controlling these.
Further, a fluorescent dye may be used instead of the fluorescent pigment, or both may be used in combination. The same applies to the following examples. In the present invention, a fluorescent pigment, a fluorescent dye,
A mixture of the two and other phosphors capable of color conversion are collectively referred to as a fluorescent face (dying) material.
【００２１】ところで、前記第一実施例において、熱可
塑性樹脂／蛍光顔料比が５以上であるロールツーロール
で作業した場合、巻き取り時にブロッキングが発生し、
また、塗膜厚が３０μｍ以下に薄くなるとハジキ等の印
刷不具合が発生しやすい。特に、通常電界発光灯用のＢ
ｌｕｅ−Ｇｒｅｅｎ発光を示す蛍光体（例えば、色度ｘ
＝．１８５、ｙ＝．４５０：１００Ｖ−４００Ｈｚ）を
ピンク系の蛍光顔料で輝度を低下させないでＷｈｉｔｅ
発光（例えば、色度ｘ＝．３３０、ｙ＝．４１０：１０
０Ｖ−４００Ｈｚ）に変換しようとすると、熱可塑性樹
脂／蛍光顔料比は２０〜２５、膜厚５０μｍが必要とな
り、の場合は印刷不具合はないがブロッキングが発生す
る。一方、熱可塑性樹脂／蛍光顔料比を減じて２にする
と、膜厚を減じて５μｍとする必要があり、ブロッキン
グは発生しないが印刷不具合が発生する。このように印
刷不具合およびブロッキングを発生することなしに厚膜
印刷で連続印刷することは困難であるため、これらの問
題を解決した実施例を第二実施例として説明する。In the first embodiment, when working with a roll-to-roll having a thermoplastic resin / fluorescent pigment ratio of 5 or more, blocking occurs during winding,
Further, when the coating film thickness is reduced to 30 μm or less, printing defects such as repelling tend to occur. In particular, B for ordinary electroluminescent lamps
A phosphor exhibiting blue-green emission (for example, chromaticity x
=. 185, y =. 450: 100V-400Hz) with a pink fluorescent pigment without lowering the brightness.
Light emission (for example, chromaticity x = .330, y = .410: 10)
(0 V-400 Hz), a thermoplastic resin / fluorescent pigment ratio of 20 to 25 and a film thickness of 50 μm are required. In this case, there is no printing problem but blocking occurs. On the other hand, if the ratio of thermoplastic resin / fluorescent pigment is reduced to 2, the film thickness must be reduced to 5 μm, and no blocking occurs but printing defects occur. Since it is difficult to perform continuous printing by thick film printing without causing printing defects and blocking as described above, an embodiment that solves these problems will be described as a second embodiment.
【００２２】図４に示すように、本発明では表面側吸湿
フィルム５の接着層を、蛍光顔料１３（例えば、シンロ
イヒ（株）製ＦＡ００１）と透明微小体１４（例えば、
ガラスビーズ）を熱可塑性樹脂（例えば、ポリウレタン
系樹脂等）１５に混合した塗料を、例えばコンマコータ
等により厚膜連続印刷し、長尺の吸湿フィルムの基材５
ｂの上に５ａを形成する。さらに、これらの吸湿フィル
ム５を任意の形状に切断後、色変換層５ａ側をラミネー
トロールや熱プレス等により透明電極４上に熱圧着し密
着させる。As shown in FIG. 4, in the present invention, the adhesive layer of the front-side moisture-absorbing film 5 is made up of a fluorescent pigment 13 (for example, FA001 manufactured by Shinloich Co., Ltd.) and a transparent fine body 14 (for example,
A coating in which glass beads are mixed with a thermoplastic resin (for example, polyurethane resin) 15 is continuously printed in a thick film using, for example, a comma coater or the like, and the base material 5 of a long moisture absorbing film is formed.
5a is formed on b. Further, after cutting these moisture-absorbing films 5 into an arbitrary shape, the color conversion layer 5a side is thermocompression-bonded to the transparent electrode 4 by a laminating roll, a hot press, or the like, and is brought into close contact therewith.
【００２３】本発明によれば、蛍光顔料１３の混合率が
低い場合でも連続印刷により、不具合なく色変換層を形
成できる。例えば、表面側吸湿フィルムに熱可塑性樹脂
（ポリウレタン系熱可塑性樹脂）１５とピンク系蛍光顔
料（シンロイヒ製ＦＡ００１）１３およびガラスビーズ
（平均粒径１８μｍ）等の透明微小球１４を重量比２
０：１：５で混合したものを、塗膜厚５０μｍで印刷し
た色変換層５ａは、巻き取り時のブロッキングがなく、
印刷性の優れた膜質を実現でき、この色変換層５ａをＢ
ｌｕｅ−Ｇｒｅｅｎ発光する電界発光素子の表面に密着
させた場合、図５の色度図に示すように、１００Ｖ−４
００Ｈｚで輝度９０［ｃｄ／ｍ2 ］、色度ｘ＝．１８
２、ｙ＝．４５０のものが色変換後、輝度９０［ｃｄ／
ｍ2 ］、色度ｘ＝．３３０、ｙ＝．４１５と輝度低下を
ほとんど引き起こさずにホワイト発光を実現することが
できる。According to the present invention, even when the mixing ratio of the fluorescent pigment 13 is low, the color conversion layer can be formed by continuous printing without problems. For example, a thermoplastic resin (polyurethane-based thermoplastic resin) 15, a pink fluorescent pigment (FA001 manufactured by Shinloich) 13, and transparent microspheres 14 such as glass beads (average particle size: 18 μm) are added to the surface-side moisture-absorbing film at a weight ratio of 2
The color conversion layer 5a in which a mixture of 0: 1: 5 was printed with a coating thickness of 50 μm had no blocking during winding,
A film quality excellent in printability can be realized.
When the device is brought into close contact with the surface of an electroluminescent element that emits blue-green light, as shown in the chromaticity diagram of FIG.
At 90 Hz, luminance 90 [cd / m 2 ], chromaticity x =. 18
2, y =. After the color conversion of 450, the luminance was 90 [cd /
m 2 ], chromaticity x =. 330, y =. 415, white light emission can be realized with almost no decrease in luminance.
【００２４】また、インクの混合比は熱可塑性樹脂１５
／（蛍光顔料１３＋ガラスビーズ等の透明微小体１４）
＝１〜４（重量比）の範囲であれば不具合なく印刷で
き、さらに、透明微小体の粒径は任意でよいが１０μｍ
以下の小粒径のものを用いると、きめ細かい発光が得ら
れ、印刷性も優れている。また、前気透明微小体１４に
アクリル等の透明なプラスチックビーズを用いてもガラ
スビーズと同様な特性が得られ、軽量であることから、
安価な色変換層を形成することができる。さらに、透明
微小体にＳｉＯ2 やＡｌ2 Ｏ3 など透明な酸化物の粉末
を用いてもガラスビーズと同様な特性が得られる。Ｓｉ
Ｏ2 やＡｌ2 Ｏ3 は粒径が数μｍ以下と非常に微小であ
るため緻密な膜を形成することができ、きめ細かな発光
を実現することができる。また、形状は球に限らず、ラ
グビーボール状、多面体でもよい。要は透明な微小体で
あればどのようなものでもよい。The mixing ratio of the ink is selected from the thermoplastic resin 15
/ (Fluorescent pigment 13 + Transparent micro body 14 such as glass beads)
= 1 to 4 (weight ratio), printing can be performed without any trouble.
When the particles having the following small particle diameters are used, fine light emission is obtained and the printability is excellent. Further, even if transparent plastic beads such as acrylic are used for the transparent fine particles 14, the same properties as glass beads can be obtained, and since they are lightweight,
An inexpensive color conversion layer can be formed. Further, even when a transparent oxide powder such as SiO 2 or Al 2 O 3 is used for the transparent fine particles, characteristics similar to those of glass beads can be obtained. Si
Since O 2 and Al 2 O 3 have extremely small particle diameters of several μm or less, a dense film can be formed and fine light emission can be realized. The shape is not limited to a sphere, but may be a rugby ball shape or a polyhedron. In short, any transparent fine body may be used.
【００２５】次に、本発明に係る第三実施例について説
明する。第一実施例では吸湿フィルム５に色変換層５ａ
を印刷した例を挙げたが、これらの色変換層は発光層の
前方ならばどの部分に設けても同様な効果が得られる。
例えば、図６に示すように透明電極４としてＩＴＯ１２
ｂとＰＥＴ（ポリエチレンテレフタレート）フィルム１
２ａからなる透明導電フィルム１２を用いた場合でも、
蛍光顔料および／または蛍光染料を一般的な樹脂（例え
ばポリウレタン系やアクリル系樹脂等）に混合した塗料
を、図２（ａ），（ｂ）に示すように例えばグラビアコ
ータやコンマコータ等により連続印刷し、前記透明導電
フィルム１２上に色変換層１１を形成することによっ
て、第一実施例と同様な効果が得られる。Next, a third embodiment according to the present invention will be described. In the first embodiment, the color conversion layer 5a
Is described, but the same effect can be obtained by providing any of these color conversion layers in front of the light emitting layer.
For example, as shown in FIG.
b and PET (polyethylene terephthalate) film 1
Even when the transparent conductive film 12 made of 2a is used,
As shown in FIGS. 2 (a) and 2 (b), continuous printing of a coating material in which a fluorescent pigment and / or a fluorescent dye is mixed with a general resin (for example, a polyurethane resin or an acrylic resin) is performed using, for example, a gravure coater or a comma coater. By forming the color conversion layer 11 on the transparent conductive film 12, the same effect as in the first embodiment can be obtained.
【００２６】さらに、第四実施例として表面側外皮フィ
ルム８に色変換層を形成する例を説明する。一般的に外
皮フィルムは基材であるフッ素系フィルム８ａにポリオ
レフィン系接着シート８ｂをドライラミしているが、こ
こでは図７のように表面側外皮フィルム８の接着層に色
変換の機能を付加するため、基材８ａに蛍光顔料もしく
は蛍光染料を熱可塑性樹脂（例えばフッ化ビニリデン
等）に混合した塗料を、図２（ａ），（ｂ）に示すよう
に例えばグラビアコータやコンマコータ等により連続印
刷し、接着層を兼ねた色変換層８ｃを形成する。さら
に、これらを封止する際、色変換層８ｃ側をラミネート
ロールや熱プレス等により透明電極４上に直接または吸
湿フィルムを介して熱圧着し密着させることによって第
一実施例と同様な効果が得られる。Further, an example in which a color conversion layer is formed on the front side skin film 8 will be described as a fourth embodiment. Generally, the skin film is obtained by dry laminating a polyolefin-based adhesive sheet 8b on a fluorine-based film 8a as a base material. Here, a color conversion function is added to the adhesive layer of the front-side skin film 8 as shown in FIG. Therefore, as shown in FIGS. 2 (a) and 2 (b), continuous printing is performed by using a coating material in which a fluorescent pigment or a fluorescent dye is mixed with a thermoplastic resin (for example, vinylidene fluoride or the like) on the base material 8a, for example, using a gravure coater or a comma coater. Then, a color conversion layer 8c also serving as an adhesive layer is formed. Further, when these are sealed, the same effect as that of the first embodiment can be obtained by thermocompression-bonding the color conversion layer 8c side directly or through a moisture absorbing film to the transparent electrode 4 with a laminating roll, a hot press, or the like. can get.
【００２７】また、上記実施例では現状の電界発光灯に
おける既存の層に色変換層を塗布する場合について説明
したが、別のフィルムに色変換層を塗布し、発光層の前
方側の他の層に密着させてもよい。また、製造装置は厚
膜印刷できる装置であればどのようなものでもよい。In the above-described embodiment, the case where the color conversion layer is applied to the existing layer in the current electroluminescent lamp has been described. However, the color conversion layer is applied to another film, and the other layer is provided on the front side of the light emitting layer. It may be adhered to the layer. The manufacturing apparatus may be any apparatus as long as it can perform thick film printing.
【００２８】次に、色変換技術の応用として、点灯非点
灯時ともに白色の電界発光灯を実現した第五実施例につ
いて図８，９を参照しながら説明する。Next, as an application of the color conversion technique, a fifth embodiment in which a white electroluminescent lamp is realized both in lighting and in non-lighting will be described with reference to FIGS.
【００２９】本発明の電界発光灯４０は図８の要部拡大
断面図に示すように、下層から順に、背面電極４１、反
射絶縁層４２、発光層４３、透明電極４４を形成した電
界発光素子４７の上下に吸湿フィルム４５，４６を貼付
け、外皮フィルム４８，４９で封止した構造をしてい
る。本発明の表面吸湿フィルム４５は、基材４５ｃ上に
蛍光顔料のボディカラーを消すための白色顔料層４５ａ
を形成し、その上に発光色を白色に変換するための色変
換層４５ｂを形成したことを特徴とする。The electroluminescent lamp 40 according to the present invention has an electroluminescent element having a back electrode 41, a reflective insulating layer 42, a luminescent layer 43, and a transparent electrode 44 formed in order from the bottom as shown in an enlarged sectional view of a main part of FIG. Moisture-absorbing films 45 and 46 are stuck on the upper and lower sides of 47 and sealed with outer films 48 and 49. The surface moisture-absorbing film 45 of the present invention has a white pigment layer 45a for erasing the body color of the fluorescent pigment on the substrate 45c.
And a color conversion layer 45b for converting the emission color to white is formed thereon.
【００３０】形成方法は、まず、酸化チタンのような白
色顔料を接着剤としての熱可塑性樹脂（例えばポリウレ
タン系樹脂等）に混合した塗料を、例えばコンマコータ
等により厚膜連続印刷し、長尺の吸湿フィルムの基材４
５ｃの上に白色顔料層４５ａを形成する。さらに、白色
顔料層４５ａの上に蛍光顔料（例えば、シンロイヒ
（株）ＦＡ００１）を熱可塑性樹脂（例えばポリウレタ
ン系樹脂等）に混合した塗料を、例えばコンマコータ等
により厚膜連続印刷し、色変換層４５ｂ側を形成する。
その後、これらの吸湿フィルム４５を任意の形状に切断
後、色変換層４５ｂ側をラミネートロールや熱プレス等
により透明電極２４上に熱圧着し密着させる。The formation method is as follows. First, a paint in which a white pigment such as titanium oxide is mixed with a thermoplastic resin (for example, a polyurethane resin or the like) as an adhesive is continuously printed in a thick film by using, for example, a comma coater, and a long film is printed. Base material 4 for moisture absorbing film
A white pigment layer 45a is formed on 5c. Further, a coating obtained by mixing a fluorescent pigment (for example, FA001) and a thermoplastic resin (for example, a polyurethane resin) on the white pigment layer 45a is continuously thick-film-printed by, for example, a comma coater, and the color conversion layer is formed. Form the 45b side.
Thereafter, these moisture absorbing films 45 are cut into an arbitrary shape, and the color conversion layer 45b side is thermocompression-bonded to the transparent electrode 24 by a laminating roll, a hot press, or the like, and adhered thereto.
【００３１】次にこれらによって得られた電界発光灯の
輝度特性について従来品と比較する。図９はそれぞれの
電界発光灯を同一駆動条件で点灯したときの輝度特性で
ある。タイプ１は従来の３色の蛍光体を用いた点灯、非
点灯時ともに白色の電界発光灯。タイプ２は従来の蛍光
体と蛍光顔料を混合した発光層を有する電界発光灯に白
色フィルターを配設した点灯、非点灯時ともに白色の電
界発光灯。タイプ３は従来の発光層の前方に色変換層を
配設したものに白色フィルターを配設した点灯、非点灯
時ともに白色の電界発光灯。タイプ４は本発明による点
灯、非点灯時ともに白色の電界発光灯の特性である。図
９のタイプ２とタイプ３との比較から、高輝度化にはタ
イプ３のように発光層の前方に色変換層を配設したほう
が有利である。これはタイプ２のように発光層に蛍光顔
料を混ぜ込んだ場合、蛍光顔料が蛍光体を覆ってしま
い、絶縁層側の反射率が低下するからである。また、ボ
ディカラーを白色化するためには３色混合の蛍光体を使
用するよりも、白色顔料層を色変換層に密着させるほう
が効果が良い。タイプ４はこれらを組み合わせることに
より、従来方法よりも１．３〜１．７倍の高輝度化が実
現できる。Next, the luminance characteristics of the electroluminescent lamp obtained as described above will be compared with those of a conventional product. FIG. 9 shows luminance characteristics when each electroluminescent lamp is lit under the same driving conditions. Type 1 is a white electroluminescent lamp using conventional three-color phosphors, both lit and not lit. Type 2 is a conventional electroluminescent lamp having a light-emitting layer in which a fluorescent substance and a fluorescent pigment are mixed and having a white filter disposed therein, and which is white in both lighting and non-lighting. Type 3 is a conventional white light-emitting lamp in which a color conversion layer is provided in front of a light-emitting layer and a white filter is provided, and both are lit and not lit. Type 4 is the characteristic of the white electroluminescent lamp in both lighting and non-lighting according to the present invention. From the comparison between Type 2 and Type 3 in FIG. 9, it is more advantageous to dispose a color conversion layer in front of the light-emitting layer as in Type 3 for higher luminance. This is because when the fluorescent pigment is mixed into the light emitting layer as in Type 2, the fluorescent pigment covers the phosphor, and the reflectance on the insulating layer side decreases. Also, in order to whiten the body color, it is more effective to make the white pigment layer adhere to the color conversion layer than to use a phosphor of a mixture of three colors. Type 4 can realize 1.3-1.7 times higher brightness than the conventional method by combining these.
【００３２】次に第五実施例の変形例として第六実施例
を図１０を参照しながら説明する。第五実施例では表面
側吸湿フィルムの基材４５ｃ上に蛍光顔料の着色を消す
白色顔料層４５ａ、その上に色変換層４５ｂと、片側に
２つの層を形成したが、第六実施例では表面側吸湿フィ
ルムの基材４５ｃの両側にこれらの層を形成したことを
特徴とする。図１０は本発明の要部拡大断面図である
が、表面側吸湿フィルムの基材４５ｃの片面に白色顔料
層４５ａを設け、反対側に色変換層４５ｂを設け、色変
換層４５ｂ側を透明電極４４上に熱圧着し、白色顔料層
４５ａ側を外皮フィルム４８に熱圧着させている。本発
明では色変換層４５ｂと白色顔料層４５ａの間に吸湿フ
ィルム４８に熱圧着させている。本発明では色変換層４
５ｂと白色顔料層４５ａの間に吸湿フィルムの基材４５
ｃを介することによって光の拡散がさらに進み、ボディ
カラーをより白色に近付けることができる。また、第
五、第六実施例では現状の電界発光灯における既存の
層、例えば表面側吸湿フィルムに色変換層および白色顔
料層を塗布する場合について説明したが、別のフィルム
に塗布し、発光層の前方側の他の層に密着させてもよ
い。Next, a sixth embodiment will be described with reference to FIG. 10 as a modification of the fifth embodiment. In the fifth embodiment, a white pigment layer 45a for erasing the coloring of the fluorescent pigment is formed on the substrate 45c of the front moisture absorbing film, a color conversion layer 45b is formed thereon, and two layers are formed on one side. These layers are formed on both sides of the substrate 45c of the front-side moisture absorbing film. FIG. 10 is an enlarged cross-sectional view of a main part of the present invention, in which a white pigment layer 45a is provided on one side of a substrate 45c of the front side moisture absorbing film, a color conversion layer 45b is provided on the opposite side, and the color conversion layer 45b side is transparent. Thermocompression bonding is performed on the electrode 44, and the white pigment layer 45 a side is thermocompression bonded to the outer cover film 48. In the present invention, thermocompression bonding to the moisture absorbing film 48 is performed between the color conversion layer 45b and the white pigment layer 45a. In the present invention, the color conversion layer 4
5b and the white pigment layer 45a between the base material 45 of the moisture absorbing film
Through c, the diffusion of light further proceeds, and the body color can be made closer to white. In the fifth and sixth embodiments, the case where the color conversion layer and the white pigment layer are applied to the existing layer in the current electroluminescent lamp, for example, the front side moisture absorbing film, has been described. It may be adhered to another layer on the front side of the layer.
【００３３】さらに、色変換技術の応用として、同一面
内で多色化を実現した例を第七実施例として図１１，１
２を参照しながら説明する。Further, as an application of the color conversion technique, an example in which multicoloring is realized in the same plane is shown as a seventh embodiment in FIGS.
This will be described with reference to FIG.
【００３４】本発明の電界発光灯５０は図１１の要部拡
大断面図および図１２の斜視図に示すように、下層から
順に、背面電極５１、反射絶縁層５２、発光層５３、透
明電極５４を形成した電界発光素子５５の上下に吸湿フ
ィルム５６，５７を貼付け、外皮フィルム５８，５９で
封止した構造をしている。発光層上の吸湿フィルム５６
は、それぞれ異なった色の蛍光顔料を塗布した吸湿フィ
ルム５６ａ，５６ｂを任意の形状に切断後、並べて配設
し、ラミネートロールや熱プレス等により透明電極５４
上に熱圧着させることができるため、従来の吸湿フィル
ムの貼付け工程を変更することなく、容易に発光色の多
色化を実現することができる。また、同一吸湿フィルム
上に発光色の異なる蛍光顔料を塗り分けたものを使用し
てもよい。As shown in the enlarged sectional view of the main part of FIG. 11 and the perspective view of FIG. 12, the electroluminescent lamp 50 of the present invention has a back electrode 51, a reflective insulating layer 52, a light emitting layer 53, and a transparent electrode 54 in order from the bottom. Are formed on the upper and lower sides of the electroluminescent element 55 on which is formed, and sealed with outer skin films 58 and 59. Moisture absorbing film 56 on light emitting layer
Is to cut the moisture absorbing films 56a and 56b coated with fluorescent pigments of different colors into arbitrary shapes, arrange them side by side, and arrange the transparent electrodes 54 by a laminating roll or hot press.
Since it can be thermocompression-bonded on the top, it is possible to easily realize multi-color emission without changing the conventional attaching process of the moisture absorbing film. Alternatively, the same moisture-absorbing film may be coated with fluorescent pigments having different emission colors.
【００３５】次に、本発明に係る第八の実施例を図１２
に示す。第七実施例では異なった色の蛍光顔料層を塗布
した吸湿フィルム５６ａ，５６ｂを用いて多色化する例
を挙げたが、図１３に示すように吸湿フィルム５６上
に、スクリーン印刷等で異なるマスクを使用して選択的
に色変換層７０を形成し、発光層上に貼り付けることに
よって、容易にかつ安価に発光色を多様化、パターン化
した電界発光灯を得られる。さらに、同一吸湿フィルム
の両面に異なる発光色の蛍光顔料を塗り分けてもよい
し、片面に蛍光顔料を塗布した吸湿フィルムを２層以上
の多層に重ねて使用してもよく、この場合、各蛍光顔料
の発光色を変えるとよい。蛍光顔料層には適宜熱可塑性
樹脂等の接着剤を混合することができる。Next, an eighth embodiment according to the present invention will be described with reference to FIG.
Shown in In the seventh embodiment, an example is described in which multicoloring is performed using the moisture absorbing films 56a and 56b coated with fluorescent pigment layers of different colors. However, as shown in FIG. By selectively forming the color conversion layer 70 using a mask and attaching the color conversion layer 70 on the light emitting layer, an electroluminescent lamp in which light emission colors are diversified and patterned easily and inexpensively can be obtained. Further, fluorescent pigments of different emission colors may be separately applied to both sides of the same moisture-absorbing film, or a moisture-absorbing film coated with a fluorescent pigment on one side may be used as a multilayer of two or more layers. It is preferable to change the emission color of the fluorescent pigment. An adhesive such as a thermoplastic resin can be appropriately mixed into the fluorescent pigment layer.
【００３６】また、吸湿フィルムのほかに、他の透光性
フィルムに上記のように蛍光顔料を塗布したものを使用
してもよいし、外皮フィルムの外面または内面に発光色
の異なる蛍光顔料を塗り分けてもよい。異なる発光色を
塗布した吸湿フィルムなどの透光性フィルムの配設位置
は、電界による劣化を防止するために、透明電極の外側
が最適であるが、透明電極と発光層間に配設してもよい
し、外皮フィルムの内面または外面に配設してもよい。In addition to the moisture absorbing film, a film obtained by applying a fluorescent pigment to another translucent film as described above may be used, or a fluorescent pigment having a different emission color may be applied to the outer surface or inner surface of the outer film. You may paint separately. The location of the translucent film such as a moisture absorbing film coated with a different emission color is optimally located outside the transparent electrode to prevent deterioration due to an electric field. It may be disposed on the inner surface or outer surface of the outer film.
【００３７】また、透光性フィルムに発光色の異なる蛍
光顔料、蛍光染料などの色変換層を形成したものを、発
光層の前方に配設したものであればどのような構成でも
よく、これにより容易かつ安価に発光色を多色化・パタ
ーン化した高輝度の電界発光灯を提供できる。Also, any structure may be used as long as a structure in which a color conversion layer such as a fluorescent pigment or a fluorescent dye having a different emission color is formed on a translucent film and disposed in front of the emission layer. Accordingly, it is possible to provide a high-luminance electroluminescent lamp in which the emission color is multicolored and patterned easily and inexpensively.
【００３８】[0038]
【発明の効果】本発明によれば、発光層の前方にフィル
ム上に形成した色変換層を他の層と密着して配設するこ
とにより、輝度低下を引き起こすことなく、任意の発光
色に変換できる電界発光灯を容易かつ安価に提供するこ
とができ、さらに蛍光顔料（または染料）の種類、濃
度、透明微小体の添加量、塗膜厚などによって様々な発
光色を実現することができ、様々な用途にも対応ができ
る。According to the present invention, by disposing a color conversion layer formed on a film in front of a light emitting layer in close contact with another layer, it is possible to obtain a desired light emitting color without lowering luminance. A convertible electroluminescent lamp can be easily and inexpensively provided, and various luminescent colors can be realized depending on the type and concentration of the fluorescent pigment (or dye), the amount of transparent fine particles added, and the thickness of the coating film. It can be used for various applications.
【００３９】また、色変換層はフィルム上に連続印刷で
き、既存の構成とほとんど変わらないため、従来の工程
を変えることなく、効率的な生産ができる。Further, since the color conversion layer can be continuously printed on a film and is almost the same as the existing configuration, efficient production can be performed without changing the conventional process.
【００４０】また、色変換層の応用として、発光層の前
方に、白色顔料層と色変換層を形成したフィルムを他の
層と密着して配設するこにより、きわめて輝度の高い点
灯、非点灯時ともに白色の電界発光灯を実現することが
できる。また、複数の色変換層を配設する異により多色
化・パターン化した電界発光灯を容易にかつ安価に量産
することができる。As an application of the color conversion layer, by disposing a film having a white pigment layer and a color conversion layer in close contact with other layers in front of the light emitting layer, it is possible to turn on and off a light with extremely high luminance. A white electroluminescent lamp can be realized both at the time of lighting. In addition, it is possible to easily and inexpensively mass-produce multicolored and patterned electroluminescent lamps by providing a plurality of color conversion layers.
【図１】 本発明の第一実施例を示す電界発光灯の要部
拡大断面図。FIG. 1 is an enlarged sectional view of a main part of an electroluminescent lamp according to a first embodiment of the present invention.
【図２】 本発明の色変換層形成方法を示す概略図。FIG. 2 is a schematic view illustrating a color conversion layer forming method of the present invention.
【図３】 本発明の第一実施例の電界発光灯の色変換効
果を示す色度図。FIG. 3 is a chromaticity diagram showing a color conversion effect of the electroluminescent lamp according to the first embodiment of the present invention.
【図４】 本発明の第二実施例を示す電界発光灯の要部
拡大断面図。FIG. 4 is an enlarged sectional view of a main part of an electroluminescent lamp according to a second embodiment of the present invention.
【図５】 本発明の第二実施例の電界発光灯の色変換効
果を示す色度図。FIG. 5 is a chromaticity diagram showing a color conversion effect of the electroluminescent lamp according to the second embodiment of the present invention.
【図６】 本発明の第三実施例の色変換層を形成した透
明導電フィルムの要部拡大断面図。FIG. 6 is an enlarged sectional view of a main part of a transparent conductive film on which a color conversion layer according to a third embodiment of the present invention is formed.
【図７】 本発明の第四実施例を示す電界発光灯の要部
拡大断面図。FIG. 7 is an enlarged sectional view of a main part of an electroluminescent lamp according to a fourth embodiment of the present invention.
【図８】 本発明の第五実施例を示す電界発光灯の要部
拡大断面図。FIG. 8 is an enlarged sectional view of a main part of an electroluminescent lamp according to a fifth embodiment of the present invention.
【図９】 本発明の第五実施例の電界発光灯の輝度特性
を従来技術と比較して示す図。FIG. 9 is a diagram showing luminance characteristics of an electroluminescent lamp according to a fifth embodiment of the present invention in comparison with a conventional technology.
【図１０】 本発明の第六実施例を示す電界発光灯の要
部拡大断面図。FIG. 10 is an enlarged sectional view of a main part of an electroluminescent lamp according to a sixth embodiment of the present invention.
【図１１】 本発明の第七実施例を示す電界発光灯の要
部拡大断面図。FIG. 11 is an enlarged sectional view of a main part of an electroluminescent lamp according to a seventh embodiment of the present invention.
【図１２】 本発明の第七実施例を示す電界発光灯の要
部斜視図。FIG. 12 is a perspective view of a main part of an electroluminescent lamp according to a seventh embodiment of the present invention.
【図１３】 本発明の第八実施例を示す電界発光灯の要
部斜視図。FIG. 13 is a perspective view of a main part of an electroluminescent lamp according to an eighth embodiment of the present invention.
【図１４】 従来の電界発光灯を示す要部拡大断面図。FIG. 14 is an enlarged sectional view of a main part showing a conventional electroluminescent lamp.
１，４１，５１ 背面電極 ２，４２．５２ 反射絶縁層 ３，４３，５３ 発光層 ４，４４，５４ 透明電極 ５，４５，５６ 表面側吸湿フィルム ５ａ，８ｃ，１１，４５ｂ，５６ａ，５６ｂ，７０ 色
変換層 ５ｂ，４５ｃ 基材 ６，４６，５７ 裏面側吸湿フィルム ６ａ，８ｂ 接着層 ７，４７，５５ 電界発光素子 ８，４８，５８ 表面側外皮フィルム ８ａ フッ素フィルム ９，４９，５９ 裏面側外皮フィルム １０，４０，５０ 電界発光灯 １２ 透明導電フィルム １２ａ ＰＥＴフィルム １２ｂ ＩＴＯ １３ 蛍光顔料 １４ 透明微小体 １５ 熱可塑性樹脂 ４５ａ 白色顔料層1, 41, 51 Back electrode 2, 42.52 Reflective insulating layer 3, 43, 53 Light emitting layer 4, 44, 54 Transparent electrode 5, 45, 56 Surface-side moisture absorbing film 5a, 8c, 11, 45b, 56a, 56b, 70 Color conversion layer 5b, 45c Base material 6, 46, 57 Backside moisture absorbing film 6a, 8b Adhesive layer 7, 47, 55 Electroluminescent element 8, 48, 58 Front side skin film 8a Fluorine film 9, 49, 59 Back side Outer film 10, 40, 50 Electroluminescent lamp 12 Transparent conductive film 12a PET film 12b ITO 13 Fluorescent pigment 14 Transparent minute body 15 Thermoplastic resin 45a White pigment layer
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−123794（ＪＰ，Ａ) 特開 平３−8294（ＪＰ，Ａ) 特開 平２−100288（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H05B 33/00 - 33/28────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-123794 (JP, A) JP-A-3-8294 (JP, A) JP-A-2-100288 (JP, A) (58) Field (Int.Cl. 6 , DB name) H05B 33/00-33/28
Claims (1)
発光層を配設し、発光層の前方に色変換層を配設した電
界発光灯において、前記色変換層は樹脂と蛍光顔（染）
料と透明微小体とからなり、かつ、樹脂と、蛍光顔
（染）料と透明微小体の和とが、重量比で１〜４である
ことを特徴とする電界発光灯。A reflective insulating layer between the back electrode and the transparent electrode;
In an electroluminescent lamp in which a light emitting layer is provided and a color conversion layer is provided in front of the light emitting layer, the color conversion layer is made of a resin and a fluorescent face (dye).
An electroluminescent lamp comprising a pigment and transparent fine particles, and wherein the sum of the resin, the fluorescent face (dying) pigment and the transparent fine particles is 1 to 4 by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5010349A JP2780216B2 (en) | 1992-06-30 | 1993-01-26 | Electroluminescent lamp |
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17238292 | 1992-06-30 | ||
| JP20206592 | 1992-07-29 | ||
| JP25603292 | 1992-09-25 | ||
| JP4-202065 | 1992-09-25 | ||
| JP4-172382 | 1992-09-25 | ||
| JP4-256032 | 1992-09-25 | ||
| JP5010349A JP2780216B2 (en) | 1992-06-30 | 1993-01-26 | Electroluminescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06163159A JPH06163159A (en) | 1994-06-10 |
| JP2780216B2 true JP2780216B2 (en) | 1998-07-30 |
Family
ID=27455379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5010349A Expired - Lifetime JP2780216B2 (en) | 1992-06-30 | 1993-01-26 | Electroluminescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2780216B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6337102B1 (en) * | 1997-11-17 | 2002-01-08 | The Trustees Of Princeton University | Low pressure vapor phase deposition of organic thin films |
| US7011983B2 (en) * | 2002-12-20 | 2006-03-14 | General Electric Company | Large organic devices and methods of fabricating large organic devices |
| JP2008052158A (en) * | 2006-08-28 | 2008-03-06 | Mitsubishi Pencil Co Ltd | Electrophoresis display device |
| JP2009087752A (en) * | 2007-09-28 | 2009-04-23 | Dainippon Printing Co Ltd | Light-emitting display element and light-emitting display panel |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6383796U (en) * | 1986-11-20 | 1988-06-01 | ||
| JP2725703B2 (en) * | 1988-10-07 | 1998-03-11 | ダイニック株式会社 | Electroluminescence light source filter |
| JPH02214129A (en) * | 1989-02-15 | 1990-08-27 | Teijin Ltd | Sealing of electronic member |
| JPH038294A (en) * | 1989-06-02 | 1991-01-16 | Hitachi Chem Co Ltd | Electric field light emitting element |
| JPH0779035B2 (en) * | 1989-10-17 | 1995-08-23 | スタンレー電気株式会社 | Distributed EL device |
| JPH04123794A (en) * | 1990-09-13 | 1992-04-23 | Kohjin Co Ltd | Electroluminescent light emitting element |
-
1993
- 1993-01-26 JP JP5010349A patent/JP2780216B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06163159A (en) | 1994-06-10 |
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