JPH0355990Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of a bendable light-emitting display body previously proposed by the applicant in Utility Model Application No. 57550/1983.

BACKGROUND ART A light-emitting display body proposed by the present applicant in Utility Application No. 57550/1980 is a light-emitting display body in which electroluminescent elements such as light-emitting diodes arranged in a row are formed with the light-emitting surface side made of a translucent material. It is encapsulated in a flexible synthetic resin encapsulant, allowing a light-emitting display of any length and shape to be obtained, and requires less man-hours for installation when used for so-called decorative lights for displays, neon signs, etc. It had the advantages of low power consumption, long life, and low total cost.

However, in such light-emitting displays, the lead wires used to supply electricity to the light-emitting elements enclosed within the flexible synthetic resin envelope are either vertically or horizontally inside the envelope. Because the lead wires are arranged in the lead wires and encapsulated through them, the lead wires are likely to break when the flexible synthetic resin envelope is bent in a state that causes a difference in the curvature of the arranged lead wires. Not only
There are problems such as distortion occurring at the bending point of the flexible synthetic resin enveloping body, which shortens the life of the enveloping body, and there remains room for improvement in this respect.

Problems to be Solved by the Invention The present invention was developed in order to solve the above-mentioned problems, and its purpose is to provide a light emitting display with a structure that is particularly strong against bending.

Means for Solving the Problems The bendable light-emitting display of the present invention is a flexible composite structure in which electroluminescent elements such as light-emitting diodes arranged in a row are formed with the light-emitting surface side made of a translucent material. A bendable light-emitting display body encapsulated within a resin encapsulation, particularly characterized in that a lead wire for energizing the light-emitting element is spirally penetrated and encapsulated within the encapsulation. It is something.

Effects and Effects of the Invention According to the light-emitting display of the present invention, the lead wires that conduct electricity to the electroluminescent elements arranged in a row within the flexible synthetic resin envelope extend in a spiral shape and pass through the envelope. Therefore, even if the envelope is bent at any point, the curvature of the lead wire at the bending point will be averaged, preventing the lead wire from breaking or bending the flexible synthetic resin. This can prevent distortion from occurring.

Therefore, in addition to having the advantages of the light-emitting display proposed in Utility Model Application No. 59-57550, there is an advantage that a light-emitting display having a structure that is particularly strong against bending can be obtained.

Embodiment of the invention An embodiment of the invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of a light-emitting display,
Fig. 2 is an enlarged view of the core portion of the rod-shaped torsion rod, Fig. 3 is a cross-sectional view taken along the - line in Fig. 2, and Fig. 4 is an enlarged view of the part A in Fig. 1. .

As seen in these figures, the light emitting display A of the present invention has a core wire portion that becomes a lead wire on the cathode side, which is formed by twisting together wire rods 11, 12, and 13 coated with insulating coatings 11a, 12a, and 13a. The lead wires 21 to 23 on the anode side, which are insulated from each other by being covered with insulating coatings 21a, 22a, and 23a, are alternately wound in a spiral shape around the outer periphery of the lead wire 1, and an electroluminescent element ( In order to irradiate the light emitted from the light emitting element (hereinafter referred to as a light emitting element) 3 to the outside of the display body A, a flexible synthetic resin enveloping body 4, in which the light emitting surface side of the light emitting element 3 is made of a translucent material, is provided. It has a structure in which it is covered as a protective film (in the illustrated example, the flexible synthetic resin envelope 4 is made of transparent resin). Then, maintaining a predetermined interval at appropriate positions on the outer periphery of the wire rods 11 to 13 constituting the core wire portion 1, a part of each insulation coating 11a to 13a is peeled off 11b to 13b to form recesses 11c to 13c, The light emitting elements 3 are placed inside these recesses 11c to 13c.
is buried. In other words, the light-emitting display body A includes light-emitting display elements 3 arranged in a row and enclosed within a flexible synthetic resin envelope 4 in which the light-emitting surface side of the light-emitting elements 3 is made of a translucent material. It has a structure in which lead wires 21 to 23 that supply electricity to the light emitting display element 3 are spirally penetrated into the envelope 4 and sealed.

The light-emitting element 3 used here is generally a light-emitting diode represented by a known semiconductor junction chip such as gallium phosphide (GaP) or gallium arsenide (GaAs), which emits light when energized. It goes without saying that it is not limited to light emitting diodes.

Moreover, such a light emitting element is provided in each of the recesses 11c to 13c provided by peeling off the insulating layers 11a to 13a at appropriate intervals on the surface of the wire rods 11 to 13 constituting the core wire portion 1. , the semiconductor bonding chip 3 is inserted, the lower part, that is, the cathode side of the semiconductor bonding chip 3 is connected to the wires 11 to 13 with silver paste, and the upper part, that is, the anode side of the semiconductor bonding chip 3 is connected to the lead wires 21 to 13 using the bonding wire 5. After connecting the peeled portions 21b to 23b of the coating 23, a translucent thermosetting resin (for example, epoxy resin is preferably used) is finally applied to the recesses 11c to 13c.
(In order to prevent a decrease in the luminous efficiency of the light emitting element 3, the inner surfaces of the recesses 11c to 13c are coated with silver plating, etc., if necessary), and the whole is buried.

Further, in this embodiment, a core wire portion 1 formed by twisting three wires is connected to the cathode side of the bonding chip 3 which becomes a light emitting element, and lead wires 21 to 23 are connected to the anode side of the bonding chip 3. Therefore, when electricity is applied between any one of the lead wires 21 to 23 and the core wire portion 1, the bonding chip 3 existing in the energized loop lights up.

The light-emitting display A having such a structure is formed into a rod-like body of a predetermined size or a continuous rod, and especially when formed like the latter, it is wound around a drum or the like (not shown) like an electric wire cord. When used, it is cut to any length and curved or bent into any shape.

Further, the light emitting display body A having such a structure is connected to the lead wires 21 by a control box (not shown) or the like.
23 and the core wire portion 1, it goes without saying that any of the light emitting elements 3 arranged in a row can be selectively turned on.

5 and 6 show a second embodiment of the present invention.

In this embodiment, the lead wires 61 to 64 on the anode side that conduct electricity to the light emitting display element 3 are not twisted together, but are kept at an appropriate distance by the transparent flexible synthetic resin forming the envelope 4. A transparent synthetic resin 9 (indicated by imaginary lines) is inserted into grooves 4a to 4d formed in a spiral shape along the outer surface of the envelope 4.
By coating it as a protective film, it has a structure in which the inside of the flexible synthetic resin envelope 4 is penetrated. Moreover, the envelope 4 has lead wires 61 to 64
Since the light-emitting display body A has a spirally twisted shape according to the shape, the light-emitting display body A itself has a structure that is more durable against bending and curving.

In the figure, 61 to 63 are lead wires on the anode side, 7 is a common core wire made of a conductive material that becomes the lead wire on the cathode side of the light emitting element 3, and 3 is a light emitting element; A recess 71 is formed in the core wire 7 at an appropriate interval.
A is filled with a translucent thermosetting resin in the same manner as in the first embodiment, and the anode side of each of these bonding chips 3 is connected to a lead via a bonding wire 8. It has a structure connected to wires 61 to 64.

A light emitting element 3 with such a structure should also be energized.
It goes without saying that by selecting , any light emitting element can be selectively turned on.

In addition, in configuring the display body of the present invention,
In the embodiments described above, only the lead wire on the anode side was made into a spiral shape, but it is also possible to make only the lead wire on the cathode side into a spiral shape.
Alternatively, both the cathode side and anode side lead wires may be configured in a spiral shape, and these are also included as embodiments of the display body of the present invention.

According to the present invention with the above structure,
Similar to the light-emitting display body proposed in No. 57550, the following effects (1) to (5) are achieved, but especially according to the present invention, the light-emitting display body has a structure that is particularly strong against bending. Since it has the advantage of providing a display body,
This significantly increases its range of use.

(1) A light-emitting display of any shape can be obtained simply by bending or curving.

(2) Since it can be easily installed using adhesives, screws, etc., there is no need to mount each light emitting element one by one by soldering, etc., and installation is extremely convenient.

(3) All the lead wires necessary for the lighting and blinking operations of the light-emitting display are enclosed within the envelope, so there is no need for wiring the lead wires.

(4) Each light emitting element is watertightly sealed with synthetic resin, making it convenient for outdoor use.

The light-emitting display of the present invention having the above-mentioned advantages can be suitably used by being attached to advertising letter lights as a substitute for neon signs, decorative lights for displays, and accident prevention guides for trucks and the like.

(5) In particular, when a light-emitting diode is used as a light-emitting element, it emits beautiful light close to monochromatic light with a high degree of purity unique to the material, so it is particularly suitable for use as a decorative light for a display. In addition, there are advantages such as no bulb burnout and low power consumption, long life and low total cost.

In the above embodiments, a plurality of light emitting elements are arranged in one row, but the light emitting elements may be arranged in multiple rows depending on the purpose of use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the present invention;
Fig. 2 is a perspective view showing the core wire portion, Fig. 3 is a sectional view taken along the line - - in Fig. 2, Fig. 4 is an enlarged view of the part A in Fig. 1, and Fig. 5 is a second embodiment of the present invention. FIG. 6 is a perspective view showing the arrangement structure of the lead wires of the embodiment shown in FIG. 5. Explanation of the symbols: A is the light emitting display of the present invention, 3 is the light emitting element, 4 is the flexible synthetic resin, 21 to 23, 61
-64 are lead wires (cathode side).

Claims (1)

[Scope of utility model registration request] The insulation coating of the insulated flexible wire material is partially peeled off, and the light emitting elements are buried in the peeled areas with the cathode side connected to the peeled part core wire, thereby forming a core part in which the light emitting elements are arranged in a row. A lead wire made of a flexible wire material with insulation coating on the outer surface of the core body is wound in a spiral shape, and the insulation coating of the lead wire is partially peeled off to form the peeled core wire and the light emitting element. The anode of the light-emitting element is connected with a bonding wire, and the outer peripheral surfaces of these are covered with a flexible synthetic resin envelope made of a translucent material to form a translucent protective film on the light-emitting surface side of the light-emitting element. A bendable light-emitting display body characterized by: