JPH032940Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of a foldable light-emitting display body previously proposed by the present applicant in Utility Model Application No. 59-57550.

BACKGROUND ART A light-emitting display body proposed by the present applicant in Utility Application No. 59-57550 is a light-emitting display body in which light-emitting 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 a light-emitting display, the lead wire used for energizing the light-emitting element enclosed within the flexible synthetic resin encapsulation is either vertically or horizontally inside the encapsulation. Because the lead wires are arranged in a direction and encapsulated through the lead wires, if the flexible synthetic resin envelope is bent in a state where the curvature of the arranged lead wires differs, the lead wires may break. In addition to making it easier, there was a problem in that the bending point of the flexible synthetic resin envelope would be distorted, shortening the life of the envelope, and there was 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 In order to solve the above problems, the bendable light emitting display of the present invention is provided with at least two light-emitting displays on the outer periphery of a rod-shaped core made of a flexible insulating material. The above continuous linear conductors are wound in a twisted wire shape with the same number of continuous linear insulating spacers interposed, and each of these linear conductors is The gist is that the two led out leads are connected and the whole is encapsulated in a flexible synthetic resin envelope made of at least a light-transmitting material on the light-emitting surface side of the light-emitting element. It is.

Functions and Effects of the Invention The light emitting display of the invention has at least two or more continuous linear conductors arranged around the outer periphery of a rod-shaped core made of a flexible insulating material, and an equal number of continuous linear insulating spacers. At the same time, each of these linear conductors is connected to two leads led out from the light emitting element provided on the linear insulating spacer side, and the entire conductor is connected to the light emitting element. Since the light-emitting surface side of the light-emitting device is encapsulated in a flexible synthetic resin envelope made of a translucent material, its structural features provide the following unique functions and effects. Ru.

(1) The structure is particularly strong against bending and twisting.
Moreover, since the linear conductor serving as the current-carrying member is bent in an even manner during bending or twisting, distortion is less likely to occur in the envelope itself.

(2) The wire conductors that serve as current-carrying members do not easily break when bent or twisted, and because they are separated from each other by the same number of insulating spacers, the wires that become current-carrying members do not break easily even when bent or twisted. It is difficult for the pitch between the conductors to change, and there is less risk of the wire conductors that are current-carrying members coming into contact with each other and causing unnecessary contact accidents. With this structure, the light emitting element can be directly attached without the need for peeling off the insulating layer when attaching the light emitting element, and manufacturing is also facilitated.

In particular, compared to the case where a linear conductor that serves as a current-carrying member is coated with an insulating layer, the installation process is simpler, and the mounting position and mounting pitch of the light emitting element can be selected within the width of the conductor. This is very convenient because it can be set arbitrarily.

(4) When bending or twisting, it is difficult to apply unnecessary stress to the light-emitting element, and therefore there is less risk of destruction of the light-emitting element.

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 a cross-sectional view thereof.

A rod-shaped core material 1 is made of a flexible insulating material, and a solid lamp 4 (not shown in FIG. 1, but its specific structure is shown in FIG. The three continuous linear conductors 21 to 23, which serve as current-carrying members of the light-emitting element constructed by the method shown in FIG. The conductors 21 to 23 are wound in a stranded manner, and a solid lamp 4 constituting a light emitting element is connected between these further wound conductors 21 to 23.

In the example, as clearly shown in FIG.
The solid lamp 4 is fitted into the recesses 31a to 33a provided in the insulating spacers 31 to 33, and two leads 41 and 42 are led out from each of the solid lamps 4.
Among them, the cathode side lead 41 is commonly connected to the conductor 21, and the anode side lead 42 is connected to the other conductor 2.
It is connected to 2 and 23.

The structure thus formed is then covered with a light-transmitting flexible synthetic resin (insulating material), and the whole structure is covered with a light-transmitting flexible synthetic resin enveloping body 5.
It has a structure enclosed in.

Here, conductors 21 to 23 and insulating spacers 31 to
When winding the conductors 33, it is desirable to wrap the conductors 21 to 23 tightly around the outer periphery of the core material 1 without any gaps, and in that case, it is necessary to prevent the conductors 21 to 23 from crossing each other.

The spacers 31 to 33 are generally made of a continuous flexible insulating material, such as silicone rubber resin, like the core material 1, but if the material can insulate the conductor, it may be made of a copper wire coated with an insulating layer. The structure and cross-sectional shape may be arbitrary.

In this case, if the core material 1 and the insulating spacers 31 to 33 are made of a translucent material, the light emission brightness effect will be extended to the entire surface of the light emitting display body A, making it even more effective.

Further, the conductors 21 to 33 are made of a material with high electrical conductivity such as copper wire or aluminum wire, and are not limited to a linear body with a circular cross section as in the embodiment, but may have a cross-sectional shape such as a square or flat shape. It may be hot.

Further, as the flexible synthetic resin forming the envelope 5, a light-transmitting material such as silicone rubber, flexible epoxy resin, etc. is preferably used, but at least the light-emitting surface side of the light-emitting element is transparent. It is sufficient if it is made of a material that has optical properties.

Such a light-emitting display A is usually formed to have an outer diameter of about 5 to 20 mm, but it should not be limited to this size and may be formed to any size depending on the purpose of use. be done.

When a solid lamp is used as the light emitting element as in the above example, the light emitting part of the light emitting display A is doubly protected by the envelope 5 and the translucent thermosetting resin 40. Therefore, the structure is such that the light emitting part is not easily damaged even when the light emitting display body is bent.

In addition, when a light-emitting element is constructed using such a solid-state lamp, the light-emitting display body can be easily constructed using a commercially available solid-state lamp, so the semiconductor chips are bonded one by one to the current-carrying member. Not only does it save you the trouble of installing it, but because the semiconductor chip is already encapsulated in a translucent thermosetting resin and reinforced, it eliminates the need for delicate handling of semiconductor chips, making it easier to manufacture. It has the advantage of becoming

As the light emitting element, a solid lamp 4 in which a semiconductor chip is preliminarily encapsulated in a translucent thermosetting resin 40 as in the above example is used (this specific example is shown in Figures 3A and 3B). ), semiconductor chips such as light emitting diodes, for example pn junction chips (herein referred to as semiconductor chips) such as gallium arsenide (GaAs), gallium phosphorus (Cap), gallium aluminum arsenide (GaAlAs), etc. may be used as they are. .

FIGS. 4 and 5 show an embodiment in which the light emitting element is constructed from a semiconductor chip.

As shown in the figure, the light emitting display A includes three conductors 21 to 23 and three insulating spacers 3 on the outer periphery of a core material 1.
The semiconductor chip 4' is fixed to one of the three conductors 21 to 23, that is, to the upper surface of 23 using a silver space 8 or the like. , connected to other conductors 21 and 22 via the bonding wire 6 from above,
Furthermore, the entire structure is enclosed within a sealing film 7 made of a translucent thermosetting resin. 5 is an envelope formed of flexible synthetic resin. Although the arrangement of the semiconductor chips 4' is not limited to that shown in the figure, the semiconductor chips 4' and the light emitting part including the bonding wires 6 are sealed and protected in the sealing film 7 as described above. This effectively prevents damage to the light-emitting portion when the light-emitting display body A is bent or twisted.

Next, FIGS. 6 and 7 show other examples of the present invention in which the attachment of the light emitting element is omitted.

The one shown in FIG.
1' and 32' are wound, and the light emitting element is omitted. In order to avoid creating gaps between the conductors 21', 22' and the spacers 31', 32', the core material 1 has an outer diameter that is similar to that of the linear conductors 21', 22' and the spacers 31', 32'. It is smaller than the outer diameter.

The one shown in FIG. 7 includes four linear conductors 21'' to 24'' and linear spacers 31'' to
34'', and the light emitter element is omitted, similar to the one shown in FIG.

In this case as well, the outer diameter of the core material 1 is the same as that of the linear conductor 21''.
24'' and the outer diameters of the spacers 31'' to 34'', so that no gaps are formed between the linear conductors 21'' to 24'' and the spacers 31'' to 34''.

The number of conductors and spacers used in the light emitting display A of the present invention may be arbitrary, and is usually arbitrarily selected within the range of 2 to 8.

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

Further, in the light-emitting display body A having such a structure, if the control circuit selectively conducts current between the conductors serving as current-carrying members, any of the light-emitting elements 4 disposed within the envelope 5 can be used. It goes without saying that it is possible to realize any lighting pattern by lighting things.
According to the present invention having the above structure, the unique functions and effects as explained in the section of functions and effects are achieved, but they are similar to the light-emitting display body proposed in Utility Model Application No. 59-57550. The following effects (1) to (5) are achieved.

(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, and the installation is extremely convenient.

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

(4) Each of the light-emitting elements is water-tightly sealed with a synthetic resin envelope, making it convenient for outdoor use. Because of these advantages, it can be used particularly as a substitute for neon signs by attaching it to advertising letter lights, decorative lights for displays, and accident prevention guides for trucks and the like.

(5) When a light-emitting diode is used as a light-emitting element, it emits beautiful light close to monochromatic light that is unique to the material, making it particularly suitable for use as a decorative light for displays. It has advantages such as a long life and low total cost because it has no energy consumption and consumes little power.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the present invention;
FIG. 2 is a cross-sectional structural diagram thereof, FIG. 3 A and B are longitudinal sections showing an example of a solid-state lamp used as a light-emitting element, and FIG. 4 is a perspective view showing a second embodiment of the present invention. FIG. 5 is a longitudinal cross-sectional structural view, and FIGS. 6 and 7 are cross-sectional views of other examples of the present invention in which the light-emitting element is omitted. Explanation of the symbols: A is the light emitting display of the present invention, 1 is a core material made of a transparent flexible insulating material, 21-
23, 21'-22', 21''-24'' are continuous conductors constituting the current-carrying member; 31-33, 31'-3
2', 31'' to 34'' are continuous spacers; 4,
4' is a solid lamp and a semiconductor chip constituting a light emitting element, and 5 is a transparent flexible synthetic resin envelope.

Claims (1)

[Claims for Utility Model Registration] (1) At least two or more continuous linear conductors with the same number of continuous linear insulating spacers interposed on the outer periphery of a rod-shaped core formed of a flexible insulating material. At the same time, each of these linear conductors is connected to two leads led out from the light emitting element provided on the linear insulating spacer side, and the whole is connected to the light emitting element. A bendable light-emitting display body whose light-emitting surface side is encapsulated in a flexible synthetic resin envelope made of a transparent material. (2) The light-emitting display according to claim 1, wherein the light-emitting element is constituted by a semiconductor chip. (3) The light-emitting display according to claim 1, wherein the light-emitting element is constituted by a solid-state lamp in which a semiconductor chip is pre-encapsulated in a translucent thermosetting resin. body.