JP2005032624A - Electroluminescent lamp and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electroluminescent lamp which is inexpensive and allows users to easily obtain light emissions in the shape of characters or figures suitable for decorations, signboards, toys, stationery and the like, and to provide a manufacturing method therefor. <P>SOLUTION: Back electrodes 2a, 2b separated from each other are formed on a base film 1. A reflective insulating layer 3 and a light emitting layer 4 are formed by printing in this order on the back electrodes. Next, a transparent electrode 5 is formed by drawing with a pen using colorless, transparent conductive ink or an ion conductive solvent over an area slightly broader than an area desired to emit light on the light emitting layer 4. Next, a layered film 6 made up of a transparent film 6a and an adhesive layer 6b is cut into an arbitrary shape, and bonded onto the transparent electrode 5 such that the adhesive layer 6b faces downward. Then, a portion of the transparent electrode 5 extending off the layered film 6 is wiped off with waste cloth or the like dampened with water or an organic solvent. The electroluminescent lamp 10 is thereby obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electroluminescent lamp suitable for decoration, signboards, toys, interiors, and the like, and a method for manufacturing the same, and in particular, by sticking an arbitrary character or figure film like a sticker, only the pasted part can easily emit light. It is related with the electroluminescent lamp which can be made, and its manufacturing method.

  An electroluminescent lamp that applies an alternating voltage between a transparent electrode and a back electrode to emit light entirely from the light emitting layer sandwiched between the two electrodes through the transparent electrode is used for a backlight of a liquid crystal display or the like. ing. In addition to this, in order to emit an arbitrary character or figure for the purpose of character display, it is necessary to selectively form a transparent electrode. For example, Japanese Patent No. 270871 discloses a peripheral edge portion of a transparent electrode. A method for insulating light and emitting light in an arbitrary shape is disclosed.

  FIG. 4 is a cross-sectional view of the main part showing the configuration of a conventional electroluminescent lamp 30. A conventional electroluminescent lamp 30 includes a transparent conductive film 31 having a transparent electrode 31b formed on a transparent film 31a by vapor deposition, sputtering, printing, etc., and phosphor particles such as zinc sulfide activated by copper, halogen, etc. A light emitting layer 32 dispersed in a binder, a reflective insulating layer 33 in which a high dielectric material such as barium titanate is dispersed in a binder such as a fluororesin, and a back electrode made of a conductive paste such as carbon or silver In general, a structure in which 34 and a back insulating layer 35 for insulating the back electrode 34 are sequentially stacked and printed is used.

Next, a method of half-cutting the transparent conductive film 31 from the transparent electrode 31b side to the transparent film 31a side with a Thomson blade or a cutting plotter as means for insulating the peripheral edge of the transparent electrode 31b and emitting only a necessary part. A method of locally destroying the peripheral edge of the transparent electrode 31b with a heater, a method of removing the peripheral edge of the transparent electrode 31b by chemical or physical etching, a method of mechanically scraping, etc. By these methods, the non-conductive portion 36 is formed at the peripheral end portion of the transparent electrode 31b.
Japanese Patent No. 2708711 (pages 2 and 3, paragraphs 0006 to 0022, FIGS. 1 to 4)

  However, the above-described conventional electroluminescent lamp 30 and the manufacturing method thereof require a large-scale facility for forming the transparent electrode 31b and forming the non-conducting portion 36 at the peripheral end thereof, resulting in high cost. In addition, there is a problem that it is difficult for general users to freely obtain light having an arbitrary shape.

  The present invention has been conceived in order to solve the above-described problems, and its purpose is to allow a user to easily emit any character or figure suitable as a decoration, signboard, toy, stationery, etc. An electroluminescent lamp and a method of manufacturing the same are provided.

  In order to achieve the above object, an electroluminescent lamp according to claim 1 of the present invention comprises a back electrode divided into at least two or more on a base film, and a reflective insulation layered on the back electrode. A transparent electrode made of a conductive ink or an ion conductive solvent containing a metal filler or a conductive polymer formed on the light emitting layer, a transparent film formed on the transparent electrode, and an adhesive layer And a laminated film. According to this structure, since the peripheral edge part of a transparent electrode can be easily insulated by affixing the laminated film of arbitrary shapes, a user can light-emit arbitrary characters and figures easily.

  The method of manufacturing an electroluminescent lamp according to claim 2 includes a step of separately forming a back electrode on a base film, a step of sequentially forming a reflective insulating layer and a light emitting layer on the back electrode, and the light emitting layer. A step of applying a transparent electrode made of a conductive ink or an ion conductive solvent containing a metal filler or a conductive polymer on the surface with a brush or pen, and a step of attaching a laminated film made of a transparent film and an adhesive layer on the transparent electrode And a step of removing the transparent electrode protruding from the laminated film. According to this method, it is possible to easily form a transparent electrode and insulate the peripheral edge without requiring a large-scale facility, so that an inexpensive electroluminescent lamp can be obtained and the user can easily Arbitrary characters and figures can be emitted.

  The method of manufacturing an electroluminescent lamp according to claim 3 includes a step of separately forming a back electrode on a base film, a step of sequentially forming a reflective insulating layer and a light emitting layer on the back electrode, and a transparent film. A step of applying a transparent electrode made of a conductive ink containing a metal filler or a conductive polymer or an ionic conductive solvent on the pressure-sensitive adhesive layer of the pressure-sensitive adhesive layer with a brush or a pen, and the layered film through the transparent electrode. And a step of affixing on the light emitting layer. According to this method, since the transparent electrode is formed on the laminated film in advance, it is not necessary to wipe off the transparent electrode later, and the user can easily emit any character or figure.

  As described above, according to the electroluminescent lamp and the manufacturing method thereof of the present invention, the transparent electrode is covered with the laminated film so as to insulate the peripheral end portion of the transparent electrode, so that a large-scale facility is required. In addition, an inexpensive electroluminescent lamp can be manufactured, and a user can emit a free shape by simply attaching a laminated film of arbitrary characters and figures. In addition, when a translucent pattern, color scheme, or character is printed in advance on the laminated film, light can be emitted so that an arbitrary pattern is raised. In addition, the user can freely reattach, and the degree of freedom of the light emission pattern can be further improved.

  Hereinafter, preferred embodiments of the electroluminescent lamp of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an essential part of an electroluminescent lamp 10 according to a first embodiment of the present invention.

  As shown in FIG. 1, the electroluminescent lamp 10 of the present invention was formed so as to cover the entire surface of the back electrodes 2a, 2b and the back electrodes 2a, 2b formed in a comb shape on the base film 1. A reflective insulating layer 3 and a light emitting layer 4, a transparent electrode 5 made of any character or figure formed on the light emitting layer 4 according to the user's preference, and a laminated film in which an adhesive layer 6b is formed on the transparent film 6a 6.

  Next, a method for manufacturing the electroluminescent lamp 10 of the present invention will be described with reference to a cross-sectional view of the main part of FIG. First, as shown in FIG. 2 (a), on the base film 1 made of polyethylene terephthalate, polyethylene, polyester, polyimide or the like, back electrodes 2a, 2b made of conductive paste such as carbon, silver, copper, nickel are screened. For example, it is divided and formed in a comb shape by printing. Next, the reflective insulating layer 3 in which a white high dielectric material such as barium titanate is dispersed in the resin and the light emitting layer 4 in which the phosphor is dispersed in the resin are sequentially formed by screen printing. Next, as shown in FIG. 2B, a transparent and transparent conductive ink (for example, ITO (Indium Tin Oxide) or ATO (Antimony Tin Oxide)) or a conductive polymer is formed on the light emitting layer 4. (For example, polyaniline or polyethylenedioxythiophene dispersed in a solvent) or a pen containing an ionic conductive solvent (for example, an ionic surfactant) and drawn wider than the portion to emit light. Form. Next, as shown in FIG.2 (c), the laminated film 6 which consists of the transparent film 6a and the adhesion layer 6b is cut out in arbitrary shapes, and the adhesive layer 6b is made the lower side and it affixes on the transparent electrode 5. FIG. Thereafter, as shown in FIG. 2D, the electroluminescent lamp 10 is obtained by wiping the transparent electrode 5 protruding from the laminated film 6 with a waste cloth or the like. At this time, in order to wipe off more easily, water or an organic solvent may be soaked in the waste or the like.

  Next, the operation of the electroluminescent lamp 10 of the present invention will be described. First, when a predetermined alternating voltage is applied to the back electrodes 2a, 2b divided and formed in a comb shape, a voltage is applied to the light emitting layer 4 between the back electrodes 2a, 2b via the transparent electrode 5, and any character or Emits light so that the figure is raised.

  According to this embodiment, by covering the transparent electrode 5 with the laminated film 6, the transparent electrode 5 can be insulated into an arbitrary shape. Thereby, the user can light any character or figure very easily without requiring a large-scale facility. In addition, by printing characters, letters, numbers, etc., in any color on the transparent film 6a in advance, the light of the light emitting layer 4 is transmitted through the printing portion and develops color, so that multicolor emission can be easily obtained. It is done. Moreover, after peeling off the laminated film 6 and wiping off the transparent electrode 5, the transparent electrode 5 and the laminated film 6 can also be formed again. Thereby, arbitrary characters and figures can be rewritten any number of times, and the degree of freedom of the light emission pattern is improved.

  The back electrodes 2a and 2b are formed by screen printing a conductive paste such as carbon, silver, copper, nickel, etc., but a resist agent is selectively printed on the base film 1 to form a metal such as aluminum. After vapor deposition, the resist layer may be washed and formed, or a metal such as aluminum may be attached to the base film 1 and then chemically etched. In this case, since the resistance values of the back electrodes 2a and 2b are low, the size can be easily increased. Furthermore, the shape of the back electrodes 2a and 2b is not limited to a comb shape, and any shape may be used as long as the electrode structure is electrically divided.

  Next, another embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a cross-sectional view of the main part showing the method for manufacturing the electroluminescent lamp 20 of the second embodiment of the present invention. First, as shown in FIG. 3A, on the base film 11 made of polyethylene terephthalate, polyethylene, polyester, polyimide, etc., back electrodes 12a, 12b made of conductive paste such as carbon, silver, copper, nickel are screened. For example, it is divided and formed in a comb shape by printing. Next, a reflective insulating layer 13 in which a white high dielectric material such as barium titanate is dispersed in the resin and a light emitting layer 14 in which the phosphor is dispersed in the resin are sequentially formed by screen printing. Next, as shown in FIG. 3B, the laminated film 16 composed of the transparent film 16a and the adhesive layer 16b is cut into an arbitrary shape, and a colorless transparent conductive ink (for example, ITO (Indium Tin Oxide) is formed on the adhesive layer 16b. ) And ATO (Antimony Tin Oxide), transparent electrode materials, conductive polymers (for example, polyaniline and polyethylenedioxythiophene) dispersed in a solvent, and ionic conductive solvents (for example, ionic surfactants) The transparent electrode 15 is formed by painting with the contained pen. Next, as shown in FIG.3 (c), the electroluminescent lamp 20 is obtained by affixing the laminated | multilayer film 16 on the light emitting layer 14 with the adhesion layer 16b and the transparent electrode 15 below.

  According to this embodiment, since the transparent electrode 15 is formed on the laminated film 16 in advance, the trouble of wiping off the transparent electrode 15 later can be saved, and the user can more easily emit any character or figure.

  By covering the transparent electrode with the laminated film and insulating the peripheral edge of the transparent electrode, an inexpensive electroluminescent lamp can be manufactured without requiring large-scale equipment, and the user can attach a laminated film of arbitrary characters and figures. Simply attach it to light up any shape you want.

Sectional drawing of the principal part of the electroluminescent lamp of 1st Example of this invention. Sectional drawing of the principal part explaining the manufacturing method of the electroluminescent lamp of 1st Example of this invention Sectional drawing of the principal part explaining the manufacturing method of the electroluminescent lamp of 2nd Example of this invention Cross-sectional view of the main parts of a conventional electroluminescent lamp

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base film 2a, 2b Back electrode 3 Reflective insulating layer 4 Light emitting layer 5 Transparent electrode 6 Laminated film 6a Transparent film 6b Adhesive layer 10 Electroluminescent lamp of 1st Example of this invention 11 Base film 12a, 12b Back electrode 13 Reflective insulating layer 14 Light emitting layer 15 Transparent electrode 16 Laminated film 16a Transparent film 16b Adhesive layer 20 Electroluminescent lamp of the second embodiment of the present invention 30 Conventional electroluminescent lamp 31 Transparent conductive film 31a Transparent film 31b Transparent electrode 32 Light emitting layer 33 Reflective insulating layer 34 Back electrode 35 Back insulating layer 36 Non-conductive portion

Claims (3)

  Including a back electrode divided and formed on at least two on the base film, a reflective insulating layer and a light emitting layer laminated on the back electrode, and a metal filler and a conductive polymer formed on the light emitting layer An electroluminescent lamp comprising: a transparent electrode made of a conductive ink or an ion conductive solvent; and a laminated film made of a transparent film formed on the transparent electrode and an adhesive layer.   A step of separately forming a back electrode on the base film, a step of sequentially forming a reflective insulating layer and a light emitting layer on the back electrode, and a conductive ink or ion containing a metal filler or a conductive polymer on the light emitting layer. A step of applying a transparent electrode made of a conductive solvent with a brush or a pen, a step of attaching a laminated film made of a transparent film and an adhesive layer on the transparent electrode, and a transparent electrode protruding from the laminated film And a step of removing the electroluminescent lamp.   A step of forming a back electrode on the base film, a step of sequentially forming a reflective insulating layer and a light emitting layer on the back electrode, and a metal filler or a conductive material on the adhesive layer of the laminated film composed of a transparent film and an adhesive layer. A step of applying a transparent electrode made of a conductive ink containing a polymer or an ionic conductive solvent with a brush or a pen, and a step of attaching the laminated film on the light emitting layer through the transparent electrode. A method for manufacturing an electroluminescent lamp.

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