JP2500503Y2 - Three-electrode structure electroluminescent lamp - Google Patents

Description

TECHNICAL FIELD The present invention relates to an organic dispersed electroluminescent lamp having a three-electrode structure, and more particularly, to an extension portion (hereinafter referred to as “first electrode”) of a third electrode sheet for thinning the surface of the electroluminescent device. 3 lead part).

2. Description of the Related Art The conventional noise prevention of an electroluminescent lamp and the structure of an electrostatic shield will be described with reference to the drawings. FIG. 3 shows the conventional 3
FIG. 4 is a plan view of the electrode electroluminescent lamp, and FIG. 4 is a sectional view. In the figure, 1 is an ordinary electroluminescence lamp, and an EL element 11 having leads 3a and 3b on the transparent electrode side (hereinafter referred to as the front surface side) and the back electrode side (hereinafter referred to as the back surface side) Skin film 1
Sealed with 2a and 12b. Reference numeral 9 denotes a third electrode sheet, which is attached to the back surface of an ordinary electroluminescent lamp with a double-sided adhesive tape (not shown). The third electrode sheet 9 has a metal foil 13 made of aluminum or the like electrically insulated on both sides by a protective film 14 made of an organic film, and a third lead 10 for electrical conduction is led out from an end surface. By connecting the third lead 10 and the surface side lead 3a of the electroluminescent lamp, the third electrode and the transparent electrode have the same potential, and noise can be prevented and electrostatic shield can be performed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the above structure, the third lead is attached so that the surface side lead of the electroluminescent lamp and the overlap portion of the electroluminescent element are overlapped, so that the surface side lead and the electroluminescent element are attached. However, there was a drawback that the thickness of the polymerized part of the was increased.

Further, in the above structure, since the third lead is separately provided, if the surface side lead of the electroluminescent lamp and the overlapping portion of the electroluminescent element are avoided, the handling becomes difficult and the machining cost becomes high. There is a drawback that it is difficult to reduce the thickness of the polymerized portion.

Means for Solving the Problems This invention provides a third electrode made of an electrically insulated metal foil on the back side of an electroluminescent lamp formed by superposing a front side lead and a back side lead on an electroluminescent element. In the electroluminescent lamp having a three-electrode structure in which the third lead portion led out from the third electrode and the surface side lead of the electroluminescent lamp are electrically connected, the third lead portion includes the third electrode. Extended
In addition, it is characterized in that it is formed in a shape that avoids an overlapping portion between the electroluminescent element and the surface side lead.

Action According to the above configuration, a part of the third electrode is extended to form the third electrode.
Since the lead portion is used and the shape of the third lead portion avoids the overlapping portion between the surface side lead and the electroluminescent element, a thin and inexpensive electroluminescent lamp having a three-electrode structure can be provided.

Embodiment Hereinafter, the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a sectional view of a third electrode sheet 2. The same parts as those of the prior art are designated by the same reference numerals and the description thereof will be omitted. The third electrode sheet has a third lead portion 4 formed so as to avoid a portion where the surface side lead 3a and the electroluminescent element 11 overlap. The third electrode sheet 2 has a metal foil 7 bonded to an insulating protective film 5 via an adhesive 6. Further, an adhesive sheet 8 for sticking to the electroluminescent lamp 1 is stuck except for the tip part for being electrically connected to the front surface side lead 3a.

The third lead portion 4 and the surface side lead 3a are positioned so as to overlap each other, and the third electrode sheet 2 is attached to the electroluminescent lamp 1 by the adhesive sheet 8. When the third lead 4 is soldered and connected to the front side lead 3a by a method such as a conductive adhesive or pressure contact, an electroluminescent lamp having a three-electrode structure is obtained.

In the above structure, the front surface side lead 3a and the back surface side lead 3b
When an AC voltage is applied between and to emit light, the noise due to vibration is reduced compared to a normal electroluminescent lamp with a two-electrode structure, and the electrical noise to other electric circuits due to the action of the electrostatic shield. Can be prevented.

Since the third lead portion 4 is formed so as to avoid the surface side lead 3a and the overlapped portion of the electroluminescent element, the thickness of the overlapped portion is not increased and there is an advantage that the electric field generating lamp can be made thin.

As described above, the present invention forms the third lead part by extending the third electrode, and avoids the surface side lead of the electroluminescent lamp and the overlapping part of the electroluminescent element, thereby electroluminescent. This has the effect of reducing the thickness of the lamp.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a sectional view of a third electrode sheet of the embodiment of FIG. 1, and FIG. 3 is a plan view of a conventional three-electrode structure electroluminescent lamp. FIG. 4 is a cross-sectional view of a conventional three-electrode structure electroluminescent lamp. 1 ... Ordinary electroluminescent lamp, 2 ... Third electrode sheet, 3a ...
... front side lead, 3b ... back side lead, 4 ... third lead part, 5 ... protective film, 6 ... adhesive, 7 ... metal foil, 8 ... adhesive sheet, 11 ... electroluminescent element .

Claims (1)

(57) [Scope of utility model registration request] 1. A third electrode, which is an electrically insulated metal foil, is provided on the back side of an electroluminescent lamp formed by superimposing a front side lead and a back side lead on an electroluminescent element.
In an electroluminescent lamp having a three-electrode structure in which a third lead portion led out from an electrode and a surface side lead of the electroluminescent lamp are electrically connected, the third lead portion extends a third electrode, and An electroluminescent lamp having a three-electrode structure, wherein the electroluminescent lamp is formed in a shape that avoids an overlapping portion between the electroluminescent element and the surface side lead.