JP2002110364A - Electroluminescent lamp and its manufacturing method - Google Patents
Electroluminescent lamp and its manufacturing methodInfo
- Publication number
- JP2002110364A JP2002110364A JP2000296446A JP2000296446A JP2002110364A JP 2002110364 A JP2002110364 A JP 2002110364A JP 2000296446 A JP2000296446 A JP 2000296446A JP 2000296446 A JP2000296446 A JP 2000296446A JP 2002110364 A JP2002110364 A JP 2002110364A
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- JP
- Japan
- Prior art keywords
- conductive layer
- layer
- transparent electrode
- electroluminescent lamp
- power supply
- Prior art date
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- Pending
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は液晶ディスプレイの
バックライト等に好適する電界発光灯に関し、特に反射
絶縁層を導電性にして電圧降下を減じ高輝度化した電界
発光灯と、かかる電界発光灯を低コストで製造できる製
造方法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 suitable for a backlight or the like of a liquid crystal display, and more particularly to an electroluminescent lamp in which a reflective insulating layer is made conductive to reduce a voltage drop and increase brightness, and such an electroluminescent lamp. At a low cost.
【０００２】[0002]
【従来の技術】近年、情報化社会の進展に伴い携帯電
話、ＰＨＳ等の携帯型情報通信機器が急速に普及してい
る。これらの情報通信機器は液晶ディスプレイを搭載し
ており、そのバックライトとして小型・薄型の電界発光
灯が使用されている。この種の電界発光灯３０は、図４
の断面図に示す構造を有し、透明フィルム２１ａ上に透
明電極２１bを形成した透明導電フィルム２１の上に、
硫化亜鉛等の蛍光体をバインダ中に分散した発光層２
２、白色高誘電体粉末をバインダ中に分散した反射絶縁
層２３、銀、カーボン等の導電ペーストからなる裏面電
極２４、フェノール樹脂、エポキシ樹脂等の絶縁保護層
２５を順次積層印刷することにより得られる。反射絶縁
層２３の白色高誘電体粉末としては、高誘電率で拡散反
射率の高いチタン酸バリウムを用いるのが一般的であ
る。2. Description of the Related Art In recent years, portable information communication devices such as mobile phones and PHSs have rapidly spread with the progress of the information society. These information communication devices are equipped with a liquid crystal display, and a small and thin electroluminescent lamp is used as a backlight thereof. This type of electroluminescent lamp 30 is shown in FIG.
Has a structure shown in the cross-sectional view of FIG. 1, on a transparent conductive film 21 in which a transparent electrode 21b is formed on a transparent film 21a,
Light emitting layer 2 in which phosphor such as zinc sulfide is dispersed in a binder
2. Obtained by sequentially laminating and printing a reflective insulating layer 23 in which a white high dielectric powder is dispersed in a binder, a back electrode 24 made of a conductive paste such as silver or carbon, and an insulating protective layer 25 such as a phenol resin or an epoxy resin. Can be As the white high dielectric powder of the reflective insulating layer 23, barium titanate having a high dielectric constant and a high diffuse reflectance is generally used.
【０００３】前記の電界発光灯３０は、静電容量を有す
る発光層２２と、同様に静電容量を有する反射絶縁層２
３とを電極間に直列接続した構造であるため、電極間に
印加された電圧は容量分割されて発光層２２と反射絶縁
層２３とに分配される。したがって、反射絶縁層２３に
比誘電率の高いチタン酸バリウムを用いることにより反
射絶縁層２３の分圧を減じ、そのぶん発光層の分圧を増
加して輝度を向上させている。The above-mentioned electroluminescent lamp 30 comprises a light emitting layer 22 having a capacitance and a reflection insulating layer 2 having a capacitance similarly.
3 is connected in series between the electrodes, the voltage applied between the electrodes is divided by the capacitance and distributed to the light emitting layer 22 and the reflective insulating layer 23. Therefore, by using barium titanate having a high relative dielectric constant for the reflective insulating layer 23, the partial pressure of the reflective insulating layer 23 is reduced, and the partial pressure of the light emitting layer is increased, thereby improving the luminance.
【０００４】[0004]
【発明が解決しようとする課題】反射絶縁層の比誘電率
を高くして発光層の分圧を増加する従来の方法では、印
加電圧の最大約８０％程度まで発光層に印加できるもの
の、すでに限界に達しており、さらなる輝度向上は困難
である。According to the conventional method of increasing the partial pressure of the light emitting layer by increasing the relative dielectric constant of the reflective insulating layer, it is possible to apply up to about 80% of the applied voltage to the light emitting layer. The limit has been reached, and it is difficult to further improve the brightness.
【０００５】そこで本発明は、上記の問題に鑑み提案さ
れたもので、その目的は、導電性白色粉末等を用いて反
射絶縁層を低インピーダンス化することにより反射絶縁
層の電圧降下を低減し、発光層の印加電圧を増加して輝
度を向上した電界発光灯を提供することである。また、
かかる電界発光灯を低コストで量産できる製造方法を提
供することである。Accordingly, the present invention has been proposed in view of the above problems, and an object of the present invention is to reduce the voltage drop of the reflective insulating layer by lowering the impedance of the reflective insulating layer using conductive white powder or the like. Another object of the present invention is to provide an electroluminescent lamp in which the luminance is improved by increasing the voltage applied to the light emitting layer. Also,
An object of the present invention is to provide a manufacturing method capable of mass-producing such an electroluminescent lamp at low cost.
【０００６】[0006]
【課題を解決するための手段】本発明の電界発光灯は、
透明電極、発光層、反射層、裏面電極が積層された電界
発光灯において、前記反射層は白色導電層であることを
特徴とする。この構成により、反射層の低インピーダン
ス化を容易に図ることができ、発光層の電界強度を高く
し、高輝度化をはかることができる。An electroluminescent lamp according to the present invention comprises:
In an electroluminescent lamp in which a transparent electrode, a light emitting layer, a reflective layer, and a back electrode are laminated, the reflective layer is a white conductive layer. With this configuration, the impedance of the reflective layer can be easily reduced, the electric field strength of the light emitting layer can be increased, and the luminance can be increased.
【０００７】また、前記白色導電層は、イオンをドーピ
ングして導体化した無機化合物系白色粉末をバインダ中
に分散したものであることを特徴とする。この構成によ
り、導体化した酸化チタンや酸化亜鉛やチタン酸バリウ
ム等の安価な白色導電性粉末を用いて反射層の低インピ
ーダンス化を図り、輝度を向上した電界発光灯を提供で
きる。[0007] The white conductive layer is characterized in that inorganic compound white powder which has been converted into a conductor by doping ions is dispersed in a binder. With this configuration, it is possible to provide an electroluminescent lamp in which the reflection layer has a low impedance by using an inexpensive white conductive powder such as conductive titanium oxide, zinc oxide, or barium titanate, thereby improving the luminance.
【０００８】また、本発明の電界発光灯の製造方法は、
透明フィルムの上に形成された透明電極の一部を除く透
明電極上に発光層を印刷して第１の積層フィルムを形成
する工程と、別体の絶縁フィルムに透明電極用給電部と
裏面電極とを印刷し、その上に全面にわたって白色導電
層を印刷して第２の積層フィルムを形成する工程と、前
記第１の積層フィルムの発光層と前記第２の積層フィル
ムの白色導電層とを対面して重ね合わせ、熱圧着する工
程を具備することを特徴とする。この構成により、反射
層を導体化したことにより、給電部を露出させるために
反射層の一部を切り欠いてパターン形成する必要がな
く、下地の全面にわたって反射層を形成できるので、煩
雑なスクリーン印刷で形成する必要がなくなり、簡易な
ドクターブレード、バーコーター、グラビアロール等で
形成できるので製造コストが低減する。[0008] The method of manufacturing an electroluminescent lamp according to the present invention comprises:
A step of printing a light emitting layer on the transparent electrode except for a part of the transparent electrode formed on the transparent film to form a first laminated film; And printing a white conductive layer over the entire surface to form a second laminated film, and the light emitting layer of the first laminated film and the white conductive layer of the second laminated film It is characterized by comprising a step of superimposing and thermocompression bonding facing each other. With this configuration, since the reflective layer is made conductive, there is no need to cut out a part of the reflective layer to form a pattern in order to expose the power supply portion, and the reflective layer can be formed over the entire surface of the base, so that a complicated screen can be formed. There is no need to form by printing, and it can be formed with a simple doctor blade, bar coater, gravure roll, etc., so that the manufacturing cost is reduced.
【０００９】また、本発明の電界発光灯の製造方法は、
透明電極の一部と透明電極用給電部の一部が白色導電層
を介して接続するように、かつ、透明電極用給電部の他
の部分と裏面電極用給電部とを覆う白色導電層が露出す
るように第１の積層フィルムと第２の積層フィルムとを
重ね合わせ、熱圧着することを特徴とする。この構成に
より、給電用ピンを白色導電層を介して透明電極用給電
部の他の部分と裏面電極用給電部とに圧接することによ
り導通が保たれ、両電極に給電して点灯することができ
る安価な高輝度の電界発光灯を提供できる。Further, the method for manufacturing an electroluminescent lamp according to the present invention comprises:
A white conductive layer that covers a part of the transparent electrode and a part of the transparent electrode power supply unit through the white conductive layer, and covers another part of the transparent electrode power supply unit and the back electrode power supply unit. The first laminated film and the second laminated film are overlapped so as to be exposed, and thermocompression-bonded. With this configuration, conduction is maintained by pressing the power supply pin to the other part of the transparent electrode power supply part and the back electrode power supply part via the white conductive layer, so that power is supplied to both electrodes and the light is emitted. An inexpensive and high-brightness electroluminescent lamp can be provided.
【００１０】また、本発明の電界発光灯の製造方法は、
透明電極用給電部と裏面電極用給電部とを覆う白色導電
層上に電極リードを当接し、該当接部を含む白色導電層
上に前記第１の積層フィルムを重ね合わせ、熱圧着する
ことを特徴とする。この構成により、白色導電層を介し
て電極リードを透明電極用給電部と裏面電極用給電部と
に圧接することにより導通が保たれ、両電極に給電して
点灯することができる安価な高輝度の電界発光灯を提供
できる。また、電極リードの接続部は、第１の積層フィ
ルムと第２の積層フィルムとで挟持されるので、機械的
強度が保持される。[0010] The method for manufacturing an electroluminescent lamp according to the present invention comprises:
The electrode lead is brought into contact with the white conductive layer covering the power supply part for the transparent electrode and the power supply part for the back electrode, and the first laminated film is laminated on the white conductive layer including the contact part, and thermocompression-bonded. Features. With this configuration, the electrode lead is pressed into contact with the power supply portion for the transparent electrode and the power supply portion for the back electrode via the white conductive layer, thereby maintaining continuity. Can be provided. Further, since the connection portion of the electrode lead is sandwiched between the first laminated film and the second laminated film, the mechanical strength is maintained.
【００１１】[0011]
【発明の実施の形態】本発明の電界発光灯の実施の形態
について図を参照しながら説明する。図１は本発明の電
界発光灯の積層構造を示す断面図である。図４の従来の
電界発光灯と異なる点は、反射絶縁層の代わりに光反射
性と導電性を有する白色導電層（反射層）を形成した構
成である。図１において、透明フィルム１ａ上に透明電
極１bを形成した透明導電フィルム１の上に、硫化亜鉛
等の蛍光体をバインダ中に分散した発光層２、導電性白
色粉末をバインダ中に分散した白色導電層３、銀、カー
ボン等の導電ペーストからなる裏面電極４、絶縁保護層
５が積層配設されている。絶縁保護層５として、フェノ
ール樹脂、エポキシ樹脂等を印刷したもの、ＰＥＴ等の
絶縁フィルムなどが使用できる。図１では積層順序は特
に限定されない。白色導電層３の使用により反射層の低
インピーダンス化を容易に図ることができ、反射層での
電圧降下を低減し発光層の印加電圧を増加でき、発光層
の電界強度を増強して高輝度化をはかることができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electroluminescent lamp according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a laminated structure of the electroluminescent lamp of the present invention. 4 differs from the conventional electroluminescent lamp in that a white conductive layer (reflective layer) having light reflectivity and conductivity is formed instead of the reflective insulating layer. In FIG. 1, on a transparent conductive film 1 having a transparent electrode 1b formed on a transparent film 1a, a light emitting layer 2 in which a phosphor such as zinc sulfide is dispersed in a binder, and a white color in which conductive white powder is dispersed in the binder. A conductive layer 3, a back electrode 4 made of a conductive paste such as silver or carbon, and an insulating protective layer 5 are laminated. As the insulating protective layer 5, a material on which phenol resin, epoxy resin, or the like is printed, an insulating film such as PET, or the like can be used. In FIG. 1, the stacking order is not particularly limited. The use of the white conductive layer 3 makes it possible to easily reduce the impedance of the reflective layer, reduce the voltage drop in the reflective layer, increase the voltage applied to the light-emitting layer, and increase the electric field strength of the light-emitting layer to achieve high brightness. Can be measured.
【００１２】前記導電性白色粉末は、酸化チタン、酸化
亜鉛、チタン酸バリウム等の無機化合物系白色粉末を導
体化したものである。導体化の手段は、無機化合物系白
色粉末にイオンをドーピングして半導体化したものが製
造容易で、低抵抗化でき、好適する。また、無機化合物
系白色粉末の表面に酸化インジウム、酸化錫等の透明導
電性化合物の薄膜を塗布、蒸着、スパッタ、ＣＶＤ等の
方法で形成したものも好適する。イオンドーピングに較
べるとやや製造コストが高くなる。また、無機化合物系
白色粉末の表面にアルミニム等の高反射性の金属薄膜を
蒸着、スパッタ等で形成したものも使用できるが、やや
反射率が低下する。The conductive white powder is obtained by converting an inorganic compound white powder such as titanium oxide, zinc oxide and barium titanate into a conductor. As a means for converting into a conductor, an inorganic compound-based white powder obtained by doping ions into a semiconductor is preferable because it can be easily manufactured and can have low resistance. It is also preferable that a thin film of a transparent conductive compound such as indium oxide or tin oxide is formed on the surface of the inorganic compound-based white powder by a method such as coating, vapor deposition, sputtering, or CVD. Manufacturing cost is slightly higher than ion doping. In addition, a highly reflective metal thin film of aluminum or the like formed on the surface of an inorganic compound-based white powder by vapor deposition, sputtering, or the like can be used, but the reflectance is slightly lowered.
【００１３】白色導電層の他の例として、前記の導電性
白色粉末をバインダ中に分散する代わりに、絶縁性の従
来の無機化合物系白色粉末（チタン酸バリウム等）と、
酸化インジウム、酸化錫等の透明導電性化合物粉末とを
バインダ中に分散して白色導電層とすることもできる。As another example of the white conductive layer, instead of dispersing the above-mentioned conductive white powder in a binder, an insulating conventional inorganic compound-based white powder (such as barium titanate) is used.
A transparent conductive compound powder such as indium oxide or tin oxide may be dispersed in a binder to form a white conductive layer.
【００１４】次に、本発明の高輝度の電界発光灯を安価
に量産する製造方法について図２を参照して説明する。
まず、図２（ａ）に示すように、透明フィルム１ａ上の
全面に形成された透明電極１ｂ上に、硫化亜鉛を銅で付
活し防湿コーティングを施した蛍光体をフッ素ゴム等の
バインダ中に分散したインクを用いて、透明電極１ｂの
一部１ｃ等を除いたパターンで発光層２をスクリーン印
刷し、第１の積層フィルム１１を形成する。発光層２の
一部２ａは透明フィルム１ａの端部又はその近傍まで延
設されている。Next, a method of mass-producing the high-brightness electroluminescent lamp of the present invention at low cost will be described with reference to FIG.
First, as shown in FIG. 2 (a), on a transparent electrode 1b formed on the entire surface of a transparent film 1a, a phosphor obtained by applying zinc sulfide with copper and applying a moisture-proof coating is placed in a binder such as fluoro rubber. The light-emitting layer 2 is screen-printed in a pattern excluding a part 1c of the transparent electrode 1b and the like, using the ink dispersed to form a first laminated film 11. A portion 2a of the light emitting layer 2 extends to the end of the transparent film 1a or to the vicinity thereof.
【００１５】次に図２（ｂ）に示すように、別体のＰＥ
Ｔなどの絶縁フィルム５Ａ（絶縁保護層）の上に銀、カ
ーボン等の導電ペーストを用いて、絶縁フィルム５Ａの
略周縁部を除いたパターンで、透明電極用給電部６と裏
面電極４をスクリーン印刷する。裏面電極４の一部は絶
縁フィルム５Ａの端部又はその近傍まで延設されて裏面
電極用給電部４ａとなっている。また、給電部６と裏面
電極４は離して形成されている。Next, as shown in FIG. 2B, a separate PE
Using a conductive paste such as silver or carbon on an insulating film 5A (insulating protective layer) of T or the like, the transparent electrode power supply unit 6 and the back electrode 4 are screened in a pattern excluding the substantially peripheral portion of the insulating film 5A. Print. A part of the back electrode 4 is extended to an end of the insulating film 5A or to the vicinity thereof to form a back electrode power supply portion 4a. Further, the power supply section 6 and the back surface electrode 4 are formed separately.
【００１６】次に図２（ｃ）に示すように、透明電極用
給電部６と裏面電極４を形成した前記絶縁フィルム５Ａ
の裏面電極等形成側全面に、白色導電層３をドクターブ
レード、バーコーター、グラビアロール等を用いて一括
して厚膜印刷し、第２の積層フィルム１２を形成する。
ここで、白色導電層３は、例えば酸化チタンにＡｌ+ ３
イオンをドープして導電性を付与した導電性白色粉末
を、例えばポリエステル系の熱可塑性樹脂からなるバイ
ンダ中に分散させたもので、光反射性と導電性を有する
特徴がある。特に、白色導電層３は全面に形成するの
で、スクリーン印刷する必要がなく、製造効率が良く製
造コストを低減できる。なお、白色導電層３に用いる他
の導電性白色粉末として、無機化合物系白色粉末の表面
に酸化インジウム、酸化錫等の透明導電性化合物の薄膜
を塗布、蒸着、スパッタ、ＣＶＤ等の方法で形成したも
のも好適する。また、無機化合物系白色粉末の表面に高
反射性の金属薄膜を蒸着、スパッタ等で形成したものも
使用できる。また、前記の導電性白色粉末をバインダ中
に分散する代わりに、絶縁性の従来の無機化合物系白色
粉末（チタン酸バリウム等）と、酸化インジウム、酸化
錫等の透明導電性化合物粉末とをバインダ中に分散して
白色導電層とすることもできる。Next, as shown in FIG. 2C, the insulating film 5A on which the transparent electrode power supply portion 6 and the back surface electrode 4 are formed.
The white conductive layer 3 is collectively thick-printed using a doctor blade, a bar coater, a gravure roll or the like on the entire surface on the side where the back electrode or the like is formed, to form a second laminated film 12.
Here, the white conductive layer 3 is made of, for example, Al + 3
Conductive white powder to which conductivity is imparted by doping ions is dispersed in a binder made of, for example, a polyester-based thermoplastic resin, and is characterized by having light reflectivity and conductivity. In particular, since the white conductive layer 3 is formed on the entire surface, it is not necessary to perform screen printing, so that manufacturing efficiency is high and manufacturing cost can be reduced. As another conductive white powder used for the white conductive layer 3, a thin film of a transparent conductive compound such as indium oxide or tin oxide is formed on the surface of the inorganic compound-based white powder by a method such as coating, vapor deposition, sputtering, or CVD. Those that have been used are also suitable. In addition, a highly reflective metal thin film formed on the surface of an inorganic compound-based white powder by vapor deposition, sputtering, or the like can be used. Instead of dispersing the conductive white powder in a binder, a conventional inorganic compound-based white powder (such as barium titanate) and a transparent conductive compound powder such as indium oxide or tin oxide are used as a binder. The white conductive layer can be dispersed in the inside.
【００１７】次に図２（ｄ）に示すように、前記第１の
積層フィルム１１の発光層２と、前記第２の積層フィル
ム１２の白色導電層３とを互いに対面させ、かつ、透明
電極の一部１ｃと透明電極用給電部６の一部６ａとが白
色導電層３を介して導通するように、かつ、透明電極用
給電部６の他の部分及び裏面電極用給電部４ａの一部を
覆う白色導電層３が露出するように配置して重ね合わ
せ、ラミネータやホットプレス等を用いて熱圧着するこ
とにより電界発光灯１０を得る。Next, as shown in FIG. 2D, the light emitting layer 2 of the first laminated film 11 and the white conductive layer 3 of the second laminated film 12 face each other, and Of the transparent electrode power supply section 6 and one part of the transparent electrode power supply section 6 and the rear electrode power supply section 4a. The electroluminescent lamp 10 is obtained by arranging and superposing the white conductive layers 3 covering the portions so as to be exposed, and performing thermocompression bonding using a laminator or a hot press.
【００１８】この電界発光灯１０を点灯するには、一端
を導線により駆動用電源に接続した接続ピン（図示しな
い）を、白色導電層３の上から前記透明電極用給電部６
と、前記裏面電極用給電部４ａとに圧接することによ
り、透明電極１ｂと裏面電極４に給電して行う。その
際、接続ピンと給電部６、４ａとの間には、白色導電層
３が介在されているが、白色導電層３は半導電性を有す
ること、及び厚みが薄いので、白色導電層３の面に垂直
方向の抵抗値は小さく、ピンと電極との導通を阻害する
ことはない。しかも、白色導電層３の面方向の抵抗値
（表面抵抗：１０５〜１０７Ω／□程度）は高いので、
透明電極用給電部６と裏面電極４とが白色導電層３によ
って短絡することはない。To turn on the electroluminescent lamp 10, a connection pin (not shown) having one end connected to a driving power supply through a conductive wire is connected to the transparent electrode power supply section 6 from above the white conductive layer 3.
Then, power is supplied to the transparent electrode 1b and the back electrode 4 by pressing against the back electrode feeding section 4a. At this time, the white conductive layer 3 is interposed between the connection pin and the power supply portions 6 and 4a. However, since the white conductive layer 3 has semiconductivity and is thin, The resistance value in the direction perpendicular to the plane is small and does not hinder conduction between the pin and the electrode. Moreover, since the resistance value of the white conductive layer 3 in the surface direction (surface resistance: about 10 5 to 10 7 Ω / □) is high,
The power supply 6 for the transparent electrode and the back electrode 4 are not short-circuited by the white conductive layer 3.
【００１９】前記のように、従来の反射絶縁層に代えて
白色導電層３を用いたことにより、この白色導電層３を
透明電極用給電部６の上、裏面電極用給電部４ａの上も
含めて全面を覆って形成できるので、煩雑なスクリーン
印刷によりパターン形成する必要がなくなり、簡易なド
クターブレード、バーコーター、グラビアロール等を用
いて全面に容易に印刷できるので、コストが低減する。
特に、白色導電層３はロールツウロールで連続印刷する
ことができるため大型の電界発光灯を容易にしかも安価
に製造することができる。As described above, since the white conductive layer 3 is used in place of the conventional reflective insulating layer, the white conductive layer 3 is formed on the transparent electrode power supply section 6 and on the back electrode power supply section 4a. Since it can be formed so as to cover the entire surface, it is not necessary to form a pattern by complicated screen printing, and printing can be easily performed over the entire surface using a simple doctor blade, bar coater, gravure roll, or the like, thereby reducing costs.
In particular, since the white conductive layer 3 can be continuously printed on a roll-to-roll basis, a large-sized electroluminescent lamp can be easily and inexpensively manufactured.
【００２０】また、発光層の上に白色導電層を印刷する
と、白色導電層のスラリの一部が発光層に浸透し絶縁耐
圧が低下するが、本発明ではあらかじめ裏面電極上に形
成された白色導電層を、乾燥後に発光層に貼り付けるた
め、スラリが発光層内に入り込むことがなく、絶縁耐圧
の低下を防止できる。When a white conductive layer is printed on the light emitting layer, a part of the slurry of the white conductive layer penetrates the light emitting layer to lower the dielectric strength. However, in the present invention, the white conductive layer formed on the back electrode in advance is used. Since the conductive layer is attached to the light-emitting layer after drying, slurry does not enter the light-emitting layer, and a decrease in withstand voltage can be prevented.
【００２１】さて、前記の実施の形態では接続ピンを圧
接して給電するタイプについて説明したが、接続ピンに
代えてリ−ド電極を装着したタイプの本発明の電界発光
灯について図３を参照して説明する。図２と同一部分は
重複する説明を省略する。図２（ｃ）に示す工程まで終
了した第２の積層フィルム１２に、図３（ａ）に示すよ
うに、透明電極用給電部６と裏面電極用給電部４ａの位
置の白色導電層３上にリード電極２１、２２の端部をそ
れぞれ当接し、次いで図３（ｂ）に示すように、前記当
接部を含む白色導電層３の全面に第１の積層フィルム１
１の発光層２側を重ね、熱圧着し、電界発光灯２０を得
る。本構成では、リ−ド電極２１、２２の接続部を第１
の積層フィルム１１と第２の積層フィルム１２とで挟持
しているためリ−ド接続強度の強い高信頼性の電界発光
灯を提供できる。In the above-described embodiment, the type in which power is supplied by pressing the connection pins is described. However, an electroluminescent lamp according to the present invention of the type in which a lead electrode is mounted in place of the connection pins is shown in FIG. I will explain. The same parts as those in FIG. 2 will not be described repeatedly. As shown in FIG. 3A, the second laminated film 12 completed up to the step shown in FIG. 2C is provided on the white conductive layer 3 at the positions of the transparent electrode power supply 6 and the back electrode power supply 4a. Then, the end portions of the lead electrodes 21 and 22 are brought into contact with each other, and as shown in FIG. 3B, the first laminated film 1 is formed on the entire surface of the white conductive layer 3 including the contact portions.
The light emitting layer 2 side is overlaid and thermocompression bonded to obtain an electroluminescent lamp 20. In this configuration, the connection between the lead electrodes 21 and 22 is the first
Since the laminated film 11 is sandwiched between the laminated film 11 and the second laminated film 12, a highly reliable electroluminescent lamp having strong lead connection strength can be provided.
【００２２】[0022]
【発明の効果】本発明の電界発光灯は、発光層と裏面電
極との間に反射層として白色導電層を介在したので、反
射層が低インピーダンスとなって、印加電圧のほとんど
が発光層に印加され、また発光層裏面側の光反射率も高
いため輝度が向上する。According to the electroluminescent lamp of the present invention, since the white conductive layer is interposed between the light-emitting layer and the back electrode as the reflection layer, the reflection layer has a low impedance, and most of the applied voltage is applied to the light-emitting layer. It is applied and the light reflectance on the back surface side of the light emitting layer is high, so that the luminance is improved.
【００２３】また、本発明の電界発光灯の製造方法は、
透明フィルムの上に形成された透明電極の一部を除く透
明電極上に発光層を印刷して第１の積層フィルムを形成
する工程と、別体の絶縁フィルムに透明電極用給電部と
裏面電極とを印刷し、その上に全面にわたって白色導電
層を印刷して第２の積層フィルムを形成する工程と、前
記第１の積層フィルムの発光層と前記第２の積層フィル
ムの白色導電層とを対面して重ね合わせ、熱圧着する工
程を具備する。反射層を導体化したことにより、透明電
極用給電部、裏面電極用給電部を露出させるために白色
導電層の一部を切り欠いてパターン形成する必要がな
く、両給電部を含む全面に白色導電層を形成できる。こ
のため、煩雑なスクリーン印刷で白色導電層を形成する
必要がなくなり、簡易なドクターブレード、バーコータ
ー、グラビアロール等で形成できるので製造コストが低
減する。Further, the method for manufacturing an electroluminescent lamp according to the present invention comprises:
A step of printing a light emitting layer on the transparent electrode except for a part of the transparent electrode formed on the transparent film to form a first laminated film; And printing a white conductive layer over the entire surface to form a second laminated film, and the light emitting layer of the first laminated film and the white conductive layer of the second laminated film It comprises a step of superimposing and thermocompression bonding facing each other. By making the reflective layer a conductor, it is not necessary to cut out a part of the white conductive layer to expose the power supply for the transparent electrode and the power supply for the back electrode, and to form a pattern. A conductive layer can be formed. Therefore, there is no need to form a white conductive layer by complicated screen printing, and the white conductive layer can be formed with a simple doctor blade, bar coater, gravure roll, or the like, so that the manufacturing cost is reduced.
【図１】 本発明の実施の形態の電界発光灯の断面図FIG. 1 is a sectional view of an electroluminescent lamp according to an embodiment of the present invention.
【図２】 本発明の電界発光灯の製造方法を説明するた
めの平面図FIG. 2 is a plan view for explaining a method of manufacturing an electroluminescent lamp according to the present invention.
【図３】 本発明の他の電界発光灯の製造方法を説明す
るための平面図FIG. 3 is a plan view for explaining another method for manufacturing an electroluminescent lamp according to the present invention.
【図４】 従来の電界発光灯の断面図FIG. 4 is a cross-sectional view of a conventional electroluminescent lamp.
１ 透明導電フィルム １ａ 透明フィルム １ｂ 透明電極 ２ 発光層 ３ 白色導電層（反射層） ４ 裏面電極 ４ａ 裏面電極用給電部 ５ 絶縁保護層 ５Ａ 絶縁フィルム ６ 透明電極用給電部 １０、２０ 電界発光灯 １１ 第１の積層フィルム １２ 第２の積層フィルム DESCRIPTION OF SYMBOLS 1 Transparent conductive film 1a Transparent film 1b Transparent electrode 2 Light emitting layer 3 White conductive layer (reflection layer) 4 Back electrode 4a Power supply part for back electrodes 5 Insulation protective layer 5A Insulating film 6 Power supply part for transparent electrodes 10, 20 Electroluminescent lamp 11 First laminated film 12 Second laminated film
Claims (5)
層された電界発光灯において、前記反射層は白色導電層
であることを特徴とする電界発光灯。1. An electroluminescent lamp in which a transparent electrode, a light emitting layer, a reflective layer, and a back electrode are laminated, wherein the reflective layer is a white conductive layer.
て導体化した無機化合物系白色粉末をバインダ中に分散
したものであることを特徴とする請求項１記載の電界発
光灯。2. The electroluminescent lamp according to claim 1, wherein the white conductive layer is formed by dispersing an inorganic compound-based white powder, which is made conductive by doping ions, in a binder.
一部を除く透明電極上に発光層を印刷して第１の積層フ
ィルムを形成する工程と、別体の絶縁フィルムに透明電
極用給電部と裏面電極とを印刷し、その上に全面にわた
って白色導電層を印刷して第２の積層フィルムを形成す
る工程と、前記第１の積層フィルムの発光層と前記第２
の積層フィルムの白色導電層とを対面して重ね合わせ、
熱圧着する工程とを具備する電界発光灯の製造方法。3. A step of printing a light emitting layer on a transparent electrode excluding a part of the transparent electrode formed on the transparent film to form a first laminated film; Printing a power supply unit and a back electrode, and printing a white conductive layer over the entire surface to form a second laminated film; and forming a light emitting layer of the first laminated film and the second
Face-to-face with the white conductive layer of the laminated film of
Thermocompression bonding.
が白色導電層を介して接続するように、かつ、前記透明
電極用給電部の他の部分と裏面電極用給電部とを覆う白
色導電層が露出するように第１の積層フィルムと第２の
積層フィルムとを重ね合わせ、熱圧着することを特徴と
する請求項３に記載の電界発光灯の製造方法。4. A part of the transparent electrode and a part of the transparent electrode power supply part are connected via a white conductive layer, and the other part of the transparent electrode power supply part and the back electrode power supply part are connected to each other. The method for manufacturing an electroluminescent lamp according to claim 3, wherein the first laminated film and the second laminated film are laminated and thermocompression-bonded so that a white conductive layer covering the first laminated film is exposed.
覆う白色導電層上に電極リードを当接し、該当接部を含
む白色導電層上に前記第１の積層フィルムを重ね合わ
せ、熱圧着することを特徴とする請求項３に記載の電界
発光灯の製造方法。5. An electrode lead is abutted on a white conductive layer covering a transparent electrode power supply portion and a back electrode power supply portion, and the first laminated film is superimposed on the white conductive layer including the contact portion. The method for manufacturing an electroluminescent lamp according to claim 3, wherein thermocompression bonding is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000296446A JP2002110364A (en) | 2000-09-28 | 2000-09-28 | Electroluminescent lamp and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000296446A JP2002110364A (en) | 2000-09-28 | 2000-09-28 | Electroluminescent lamp and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002110364A true JP2002110364A (en) | 2002-04-12 |
Family
ID=18778723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000296446A Pending JP2002110364A (en) | 2000-09-28 | 2000-09-28 | Electroluminescent lamp and its manufacturing method |
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| Country | Link |
|---|---|
| JP (1) | JP2002110364A (en) |
-
2000
- 2000-09-28 JP JP2000296446A patent/JP2002110364A/en active Pending
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